diff --git a/candle_countdown.go b/candle_countdown.go
new file mode 100644
index 0000000..7f5f566
--- /dev/null
+++ b/candle_countdown.go
@@ -0,0 +1,49 @@
+package mujica
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/theme"
+)
+
+// CandleCountdownOptions configure a CandleCountdown.
+type CandleCountdownOptions struct {
+	// Location aligns days and weeks; nil is UTC, as exchanges count.
+	Location *time.Location
+}
+
+// CandleCountdown shows the time left until the current candle of interval closes; it wakes once a second only while shown.
+func CandleCountdown(c *ui.Context, interval Interval, opts CandleCountdownOptions) *ui.Element {
+	loc := opts.Location
+	if loc == nil {
+		loc = time.UTC
+	}
+	now := c.Now()
+	left := interval.Close(now, loc).Sub(now)
+	k := Tokens(c)
+	text := candleCountdownText(left)
+	e := ui.Row(c).Gap(Density(c).Unit()).AlignItems(ui.Center).Role(ui.RoleText).Label(fmt.Sprintf(msg(c, "candle_countdown.label"), string(interval), text))
+	e.Children(func() {
+		ui.Text(c, string(interval)).FontSize(FontSize(c, theme.CaptionSize)).TextColor(k.TextMuted)
+		ui.Text(c, text).FontFeatures("tnum").FontWeight(500).TextColor(k.Text).SingleLine()
+	})
+	// The next whole second, so the text never skips one.
+	c.After(left - left.Truncate(time.Second) + time.Millisecond)
+	return e
+}
+
+// candleCountdownText writes d as 59:58, 3:59:58 or 2d 03:59:58.
+func candleCountdownText(d time.Duration) string {
+	s := int(d.Seconds())
+	days, h, m, sec := s/86400, s/3600%24, s/60%60, s%60
+	switch {
+	case days > 0:
+		return fmt.Sprintf("%dd %02d:%02d:%02d", days, h, m, sec)
+	case h > 0:
+		return fmt.Sprintf("%d:%02d:%02d", h, m, sec)
+	}
+	return fmt.Sprintf("%02d:%02d", m, sec)
+}
diff --git a/chart_type_switcher.go b/chart_type_switcher.go
new file mode 100644
index 0000000..7102cf4
--- /dev/null
+++ b/chart_type_switcher.go
@@ -0,0 +1,35 @@
+package mujica
+
+import (
+	"fmt"
+
+	"github.com/egoist/mygo/ui"
+)
+
+// ChartTypeSwitcherOptions configure a ChartTypeSwitcher.
+type ChartTypeSwitcherOptions struct {
+	Disabled bool
+}
+
+// ChartTypeSwitcher chooses how CandlestickChart draws: candles, OHLC bars, line, area or Heikin-Ashi.
+func ChartTypeSwitcher(c *ui.Context, value *ChartType, opts ChartTypeSwitcherOptions) ChoiceResult {
+	if value == nil {
+		panic("mujica: ChartTypeSwitcher needs a value")
+	}
+	if *value < ChartCandles || *value > ChartHeikinAshi {
+		panic(fmt.Sprintf("mujica: unknown ChartType %d", *value))
+	}
+	var items []ToggleItem[ChartType]
+	for t := ChartCandles; t <= ChartHeikinAshi; t++ {
+		items = append(items, ToggleItem[ChartType]{Value: t, Label: msg(c, fmt.Sprintf("chart_type_switcher.type%d", t))})
+	}
+	sel := []ChartType{*value}
+	var r ChoiceResult
+	ui.Row(c).Disabled(opts.Disabled).Children(func() {
+		r = ToggleGroup(c, &sel, items, ToggleGroupOptions{Label: msg(c, "chart_type_switcher.label")})
+	})
+	if r.Changed() {
+		*value = sel[0]
+	}
+	return r
+}
diff --git a/drawing_toolbar.go b/drawing_toolbar.go
new file mode 100644
index 0000000..9341640
--- /dev/null
+++ b/drawing_toolbar.go
@@ -0,0 +1,127 @@
+package mujica
+
+import (
+	"fmt"
+	"log/slog"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/icons"
+	"mujicaui/internal"
+	"mujicaui/theme"
+)
+
+// DrawingToolbarOptions configure a DrawingToolbar.
+type DrawingToolbarOptions struct {
+	// Horizontal lays the tools in a row; the default is a column beside the chart.
+	Horizontal bool
+}
+
+// DrawingToolbar picks the drawing tool, locks, clears and undoes; Alt+1 to Alt+6 pick tools anywhere in the window.
+func DrawingToolbar(c *ui.Context, d *DrawingTools, opts DrawingToolbarOptions) ChoiceResult {
+	if d == nil {
+		panic("mujica: DrawingToolbar needs drawings")
+	}
+	if d.Tool < ToolSelect || d.Tool > ToolText {
+		panic(fmt.Sprintf("mujica: unknown DrawingTool %d", d.Tool))
+	}
+	k := Tokens(c)
+	u := Density(c).Unit()
+	changed := false
+	bar := ui.Column(c).Gap(u).Padding(u).Radius(theme.CardRadius).Background(k.Surface).Border(theme.BorderWidth, k.Border).
+		Role(ui.RoleToolbar).Label(msg(c, "drawing_toolbar.label"))
+	if opts.Horizontal {
+		bar.Row().FocusGroup(ui.Horizontal)
+	} else {
+		bar.FocusGroup(ui.Vertical)
+	}
+	pick := func(t DrawingTool) {
+		if !d.Locked && d.Tool != t && !bar.IsDisabled() {
+			d.Tool, changed = t, true
+			slog.Debug("mujica: drawing_toolbar tool", "tool", t)
+		}
+	}
+	digits := []ui.Key{ui.Key1, ui.Key2, ui.Key3, ui.Key4, ui.Key5, ui.Key6}
+	for t := ToolSelect; t <= ToolText; t++ {
+		if c.Shortcut(ui.Alt, digits[t]) {
+			pick(t)
+		}
+	}
+	bar.Children(func() {
+		for t := ToolSelect; t <= ToolText; t++ {
+			name := fmt.Sprintf("%s (Alt+%d)", msg(c, fmt.Sprintf("drawing_toolbar.tool%d", t)), t+1)
+			on := d.Tool == t
+			b := ui.ButtonBase(c).Key(t).Size(theme.MinHitSize+4, theme.MinHitSize+4).Radius(theme.ControlRadius).Label(name).Tooltip(name).Disabled(d.Locked)
+			internal.Ring(b, k.Focus, theme.ControlRadius)
+			fg := k.Text
+			switch {
+			case on:
+				b.Background(k.Selection).Border(theme.BorderWidth, k.AccentText)
+				fg = k.AccentText
+			case b.Hovered():
+				b.Background(k.SurfaceHover)
+			}
+			b.Draw(func(p *ui.Painter, r ui.Rect) { drawingToolGlyph(p, r, t, fg) })
+			if b.Clicked() {
+				pick(t)
+			}
+		}
+		div := ui.Box(c).Background(k.Border).Role(ui.RoleNone)
+		if opts.Horizontal {
+			div.Size(theme.BorderWidth, u*6)
+		} else {
+			div.Size(u*6, theme.BorderWidth)
+		}
+		lockName := msg(c, "drawing_toolbar.lock")
+		if d.Locked {
+			lockName = msg(c, "drawing_toolbar.unlock")
+		}
+		lock := iconAction(c, icons.Must("lock"), lockName).Tooltip(lockName)
+		if d.Locked {
+			lock.Background(k.Selection).TextColor(k.AccentText)
+		}
+		if lock.Clicked() && !bar.IsDisabled() {
+			d.Locked, changed = !d.Locked, true
+			d.Tool = ToolSelect
+			slog.Debug("mujica: drawing_toolbar lock", "locked", d.Locked)
+		}
+		undo := iconAction(c, icons.Must("rotate-ccw"), msg(c, "drawing_toolbar.undo")).Tooltip(msg(c, "drawing_toolbar.undo")).Disabled(!d.CanUndo())
+		if undo.Clicked() && d.Undo() {
+			changed = true
+		}
+		clear := iconAction(c, icons.Must("trash-2"), msg(c, "drawing_toolbar.clear")).Tooltip(msg(c, "drawing_toolbar.clear")).Disabled(d.Locked || len(d.Items) == 0)
+		if clear.Clicked() && d.Clear() {
+			changed = true
+		}
+	})
+	return ChoiceResult{bar, changed}
+}
+
+// drawingToolGlyph draws a small picture of tool t in r.
+func drawingToolGlyph(p *ui.Painter, r ui.Rect, t DrawingTool, col ui.Color) {
+	cx, cy := internal.Snap(p, r.X+r.W/2), internal.Snap(p, r.Y+r.H/2)
+	s := float32(8)
+	switch t {
+	case ToolSelect:
+		var path ui.Path
+		path.MoveTo(cx-5, cy-7).LineTo(cx+5, cy+1).LineTo(cx, cy+1).LineTo(cx+3, cy+7).LineTo(cx+1, cy+8).LineTo(cx-2, cy+2).LineTo(cx-5, cy+5).Close()
+		p.FillPath(&path, col)
+	case ToolTrendLine:
+		p.Line(cx-s, cy+s, cx+s, cy-s, 1.5, col)
+		p.FillPath(internal.Diamond(cx-s, cy+s, 5), col)
+		p.FillPath(internal.Diamond(cx+s, cy-s, 5), col)
+	case ToolHorizontal:
+		p.Line(cx-s, cy, cx+s, cy, 1.5, col)
+		p.FillPath(internal.Diamond(cx, cy, 5), col)
+	case ToolFibonacci:
+		for i, f := range []float32{-1, -0.4, 0.2, 1} {
+			w := []float32{1.5, 1, 1, 1.5}[i]
+			p.Line(cx-s, cy+f*s, cx+s, cy+f*s, w, col)
+		}
+	case ToolRectangle:
+		p.Stroke(ui.Rect{X: cx - s, Y: cy - s*0.7, W: 2 * s, H: 1.4 * s}, col, 1, 1.5)
+	case ToolText:
+		p.Line(cx-s*0.8, cy-s, cx+s*0.8, cy-s, 2, col)
+		p.Line(cx, cy-s, cx, cy+s, 2, col)
+	}
+}
diff --git a/indicator_selector.go b/indicator_selector.go
new file mode 100644
index 0000000..7e82067
--- /dev/null
+++ b/indicator_selector.go
@@ -0,0 +1,115 @@
+package mujica
+
+import (
+	"fmt"
+	"log/slog"
+	"slices"
+	"strings"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/icons"
+	"mujicaui/theme"
+)
+
+// IndicatorSelectorOptions configure an IndicatorSelector.
+type IndicatorSelectorOptions struct {
+	Disabled bool
+}
+
+// IndicatorSelector opens a panel to search, add, remove and tune indicators: overlays go on the price chart, the rest into panes.
+func IndicatorSelector(c *ui.Context, overlays *[]IndicatorOverlay, panes *IndicatorPanes, opts IndicatorSelectorOptions) ChoiceResult {
+	if overlays == nil || panes == nil {
+		panic("mujica: IndicatorSelector needs overlays and panes")
+	}
+	k := Tokens(c)
+	u := Density(c).Unit()
+	changed := false
+	box := ui.Row(c).Disabled(opts.Disabled)
+	box.Children(func() {
+		open := ui.Local(box, "indicator_selector.open", func() bool { return false })
+		query := ui.Local(box, "indicator_selector.query", func() string { return "" })
+		if box.IsDisabled() {
+			*open = false
+		}
+		label := fmt.Sprintf(msg(c, "indicator_selector.button"), len(*overlays)+len(panes.Panes))
+		trigger := Button(c, label, ButtonOptions{Variant: Secondary, Icon: icons.Must("plus")})
+		if trigger.Clicked() {
+			*open = !*open
+		}
+		Popover(c, trigger, open, PopoverOptions{Title: msg(c, "indicator_selector.title"), Width: 340}, func() {
+			TextInput(c, query, TextInputOptions{Placeholder: msg(c, "indicator_selector.search"), Label: msg(c, "indicator_selector.search"), Clearable: true})
+			ui.Text(c, msg(c, "indicator_selector.available")).FontSize(FontSize(c, theme.CaptionSize)).TextColor(k.TextMuted).Margin(u, 0, 0, 0)
+			found := 0
+			for kind := IndicatorMA; kind <= IndicatorOBV; kind++ {
+				name := kind.String()
+				if q := strings.TrimSpace(*query); q != "" && !strings.Contains(strings.ToLower(name), strings.ToLower(q)) {
+					continue
+				}
+				found++
+				ui.Row(c).Key(name).AlignItems(ui.Center).Gap(u * 2).MinHeight(Density(c).ControlHeight()).Children(func() {
+					ui.Text(c, name).FontWeight(600).Width(56)
+					where := "indicator_selector.pane"
+					if indicatorInfo[kind].overlay {
+						where = "indicator_selector.overlay"
+					}
+					ui.Text(c, msg(c, where)).FontSize(FontSize(c, theme.CaptionSize)).TextColor(k.TextMuted).Grow(1)
+					if Button(c, msg(c, "indicator_selector.add"), ButtonOptions{Variant: Ghost, Label: fmt.Sprintf(msg(c, "indicator_selector.add_named"), name)}).Clicked() {
+						if indicatorInfo[kind].overlay {
+							*overlays = append(slices.Clone(*overlays), IndicatorOverlay{Kind: kind, Params: kind.DefaultParams()})
+						} else {
+							panes.Panes = append(slices.Clone(panes.Panes), IndicatorPaneSpec{Kind: kind, Params: kind.DefaultParams()})
+						}
+						changed = true
+						slog.Debug("mujica: indicator_selector add", "kind", name)
+					}
+				})
+			}
+			if found == 0 {
+				ui.Text(c, msg(c, "indicator_selector.none")).TextColor(k.TextMuted)
+			}
+			if len(*overlays)+len(panes.Panes) == 0 {
+				return
+			}
+			ui.Text(c, msg(c, "indicator_selector.active")).FontSize(FontSize(c, theme.CaptionSize)).TextColor(k.TextMuted).Margin(u*2, 0, 0, 0)
+			remove := -1
+			for i := range *overlays {
+				if indicatorSelectorActive(c, u, fmt.Sprint("o", i), (*overlays)[i].Kind, &(*overlays)[i].Params, &changed) {
+					remove = i
+				}
+			}
+			if remove >= 0 {
+				*overlays = slices.Delete(slices.Clone(*overlays), remove, remove+1)
+				changed = true
+			}
+			remove = -1
+			for i := range panes.Panes {
+				if indicatorSelectorActive(c, u, fmt.Sprint("p", i), panes.Panes[i].Kind, &panes.Panes[i].Params, &changed) {
+					remove = i
+				}
+			}
+			if remove >= 0 {
+				panes.Panes = slices.Delete(slices.Clone(panes.Panes), remove, remove+1)
+				changed = true
+			}
+		})
+	})
+	return ChoiceResult{box, changed}
+}
+
+// indicatorSelectorActive is one added indicator with its parameters and a remove button; it reports removal.
+func indicatorSelectorActive(c *ui.Context, u float32, key string, kind IndicatorKind, params *[]float64, changed *bool) bool {
+	removed := false
+	ui.Row(c).Key(key).AlignItems(ui.Center).Gap(u * 2).Wrap().Children(func() {
+		ui.Text(c, kind.String()).FontWeight(600).Width(56)
+		if len(kind.DefaultParams()) > 0 && IndicatorParamsField(c, kind, params).Changed() {
+			*changed = true
+		}
+		ui.Spacer(c)
+		if iconAction(c, icons.Must("x"), fmt.Sprintf(msg(c, "indicator_pane.remove"), indicatorName(kind, *params))).Clicked() {
+			removed = true
+			slog.Debug("mujica: indicator_selector remove", "kind", kind)
+		}
+	})
+	return removed
+}
diff --git a/interval_selector.go b/interval_selector.go
new file mode 100644
index 0000000..693ebcf
--- /dev/null
+++ b/interval_selector.go
@@ -0,0 +1,122 @@
+package mujica
+
+import (
+	"fmt"
+	"log/slog"
+	"slices"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/icons"
+	"mujicaui/internal"
+	"mujicaui/theme"
+)
+
+// intervalGroups sorts Intervals under their headings.
+var intervalGroups = []struct {
+	key   string
+	items []Interval
+}{
+	{"interval_selector.minutes", []Interval{"1m", "3m", "5m", "15m", "30m"}},
+	{"interval_selector.hours", []Interval{"1h", "2h", "4h", "6h", "12h"}},
+	{"interval_selector.days", []Interval{"1D", "3D", "1W", "1M"}},
+}
+
+// IntervalSelectorOptions configure an IntervalSelector.
+type IntervalSelectorOptions struct {
+	Disabled bool
+}
+
+// IntervalSelector picks a candle period: favorites show as quick buttons, and a grouped list holds all, each with a star.
+func IntervalSelector(c *ui.Context, value *Interval, favorites *[]Interval, opts IntervalSelectorOptions) ChoiceResult {
+	if value == nil || favorites == nil {
+		panic("mujica: IntervalSelector needs a value and favorites")
+	}
+	for _, iv := range append([]Interval{*value}, *favorites...) {
+		if !slices.Contains(Intervals, iv) {
+			panic(fmt.Sprintf("mujica: unknown Interval %q", string(iv)))
+		}
+	}
+	k := Tokens(c)
+	u := Density(c).Unit()
+	changed := false
+	row := ui.Row(c).Gap(u * 2).AlignItems(ui.Center).Disabled(opts.Disabled)
+	disabled := row.IsDisabled()
+	row.Children(func() {
+		quick := slices.Clone(*favorites)
+		if !slices.Contains(quick, *value) {
+			quick = append(quick, *value)
+		}
+		slices.SortFunc(quick, func(a, b Interval) int { return slices.Index(Intervals, a) - slices.Index(Intervals, b) })
+		items := make([]ToggleItem[Interval], len(quick))
+		for i, iv := range quick {
+			items[i] = ToggleItem[Interval]{Value: iv, Label: string(iv)}
+		}
+		sel := []Interval{*value}
+		if ToggleGroup(c, &sel, items, ToggleGroupOptions{Label: msg(c, "interval_selector.label")}).Changed() && !disabled {
+			*value, changed = sel[0], true
+		}
+		trigger := Button(c, "", ButtonOptions{Variant: Ghost, Icon: icons.Must("chevron-down"), Label: msg(c, "interval_selector.all")})
+		open := ui.Local(row, "interval_selector.open", func() bool { return false })
+		if disabled {
+			*open = false
+		}
+		if trigger.Clicked() && !disabled {
+			*open = !*open
+		}
+		Popover(c, trigger, open, PopoverOptions{Label: msg(c, "interval_selector.all"), Width: 220}, func() {
+			for _, g := range intervalGroups {
+				ui.Text(c, msg(c, g.key)).FontSize(FontSize(c, theme.CaptionSize)).TextColor(k.TextMuted).Margin(u, 0, 0, u)
+				for _, iv := range g.items {
+					if intervalSelectorRow(c, k, u, iv, iv == *value, slices.Contains(*favorites, iv), favorites) {
+						*value, changed, *open = iv, true, false
+					}
+				}
+			}
+		})
+	})
+	if changed {
+		slog.Debug("mujica: interval_selector changed", "interval", *value)
+	}
+	return ChoiceResult{row, changed}
+}
+
+// intervalSelectorRow is one interval with its star; it reports choosing the interval.
+func intervalSelectorRow(c *ui.Context, k theme.Tokens, u float32, iv Interval, on, fav bool, favorites *[]Interval) bool {
+	chosen := false
+	ui.Row(c).Key(string(iv)).AlignItems(ui.Center).Gap(u).Children(func() {
+		b := ui.ButtonBase(c).Grow(1).MinHeight(Density(c).ControlHeight()).Padding(0, u*2).Justify(ui.Start).Radius(theme.ControlRadius).Gap(u * 2)
+		internal.Ring(b, k.Focus, theme.ControlRadius)
+		if on {
+			b.Background(k.Selection).TextColor(k.AccentText)
+		} else if b.Hovered() {
+			b.Background(k.SurfaceHover)
+		}
+		b.Children(func() {
+			ui.Box(c).Size(14, 14).Draw(func(p *ui.Painter, r ui.Rect) {
+				if on {
+					internal.Mark(p, r, "check", k.AccentText)
+				}
+			})
+			ui.Text(c, string(iv)).SingleLine()
+		})
+		chosen = b.Clicked()
+		name := fmt.Sprintf(msg(c, "interval_selector.favorite"), iv)
+		if fav {
+			name = fmt.Sprintf(msg(c, "interval_selector.unfavorite"), iv)
+		}
+		star := iconAction(c, icons.Must("star"), name)
+		if fav {
+			star.TextColor(k.Warning)
+		}
+		if star.Clicked() && !star.IsDisabled() {
+			if fav {
+				*favorites = slices.DeleteFunc(slices.Clone(*favorites), func(x Interval) bool { return x == iv })
+			} else {
+				*favorites = append(slices.Clone(*favorites), iv)
+			}
+			slog.Debug("mujica: interval_selector favorite", "interval", iv, "on", !fav)
+		}
+	})
+	return chosen
+}
diff --git a/messages_mktchart.go b/messages_mktchart.go
index 899e06f..3930344 100644
--- a/messages_mktchart.go
+++ b/messages_mktchart.go
@@ -2,33 +2,73 @@ package mujica
 
 func init() {
 	addMessages(map[string][2]string{
-		"candlestick_chart.ohlc":    {"O %s H %s L %s C %s", "开 %s 高 %s 低 %s 收 %s"},
-		"candlestick_chart.volume":  {"Vol", "量"},
-		"heikin_ashi.smoothed":      {"Heikin-Ashi", "平均 K 线"},
-		"heikin_ashi.raw":           {"Candles", "原 K 线"},
-		"heikin_ashi.switch":        {"Candle style", "K 线样式"},
-		"compare_symbol.label":      {"Compared symbols", "对比品种"},
-		"compare_symbol.remove":     {"Remove %s", "移除 %s"},
-		"price_alert_line.tag":      {"Alert %s", "预警 %s"},
-		"chart_sync.link":           {"Sync with other charts", "与其他图表同步"},
-		"chart_sync.linked":         {"Synced", "已同步"},
-		"chart_sync.unlinked":       {"Not synced", "未同步"},
-		"indicator_pane.remove":     {"Remove %s", "移除 %s"},
-		"line_quote_chart.price":    {"Price", "价格"},
-		"line_quote_chart.average":  {"Average", "均价"},
-		"line_quote_chart.pre":      {"Pre-market", "盘前"},
-		"line_quote_chart.after":    {"After hours", "盘后"},
-		"depth_chart.bids":          {"Bids", "买盘"},
-		"depth_chart.asks":          {"Asks", "卖盘"},
-		"depth_chart.bid":           {"Bid", "买"},
-		"depth_chart.ask":           {"Ask", "卖"},
-		"depth_chart.total":         {"cumulative %s", "累计 %s"},
-		"depth_chart.mid":           {"Mid", "中间价"},
-		"volume_profile.value_area": {"Value area", "价值区"},
-		"volume_profile.other":      {"Outside", "区外"},
-		"volume_profile.poc":        {"POC", "控制点"},
-		"volume_profile.vah":        {"VAH", "价值区上沿"},
-		"volume_profile.val":        {"VAL", "价值区下沿"},
-		"drawing_tools.note":        {"Note", "标注"},
+		"candlestick_chart.ohlc":       {"O %s H %s L %s C %s", "开 %s 高 %s 低 %s 收 %s"},
+		"candlestick_chart.volume":     {"Vol", "量"},
+		"heikin_ashi.smoothed":         {"Heikin-Ashi", "平均 K 线"},
+		"heikin_ashi.raw":              {"Candles", "原 K 线"},
+		"heikin_ashi.switch":           {"Candle style", "K 线样式"},
+		"compare_symbol.label":         {"Compared symbols", "对比品种"},
+		"compare_symbol.remove":        {"Remove %s", "移除 %s"},
+		"price_alert_line.tag":         {"Alert %s", "预警 %s"},
+		"chart_sync.link":              {"Sync with other charts", "与其他图表同步"},
+		"chart_sync.linked":            {"Synced", "已同步"},
+		"chart_sync.unlinked":          {"Not synced", "未同步"},
+		"indicator_pane.remove":        {"Remove %s", "移除 %s"},
+		"line_quote_chart.price":       {"Price", "价格"},
+		"line_quote_chart.average":     {"Average", "均价"},
+		"line_quote_chart.pre":         {"Pre-market", "盘前"},
+		"line_quote_chart.after":       {"After hours", "盘后"},
+		"depth_chart.bids":             {"Bids", "买盘"},
+		"depth_chart.asks":             {"Asks", "卖盘"},
+		"depth_chart.bid":              {"Bid", "买"},
+		"depth_chart.ask":              {"Ask", "卖"},
+		"depth_chart.total":            {"cumulative %s", "累计 %s"},
+		"depth_chart.mid":              {"Mid", "中间价"},
+		"volume_profile.value_area":    {"Value area", "价值区"},
+		"volume_profile.other":         {"Outside", "区外"},
+		"volume_profile.poc":           {"POC", "控制点"},
+		"volume_profile.vah":           {"VAH", "价值区上沿"},
+		"volume_profile.val":           {"VAL", "价值区下沿"},
+		"time_range_selector.custom":   {"Custom", "自定义"},
+		"time_range_selector.label":    {"Time range", "时间范围"},
+		"interval_selector.label":      {"Interval", "周期"},
+		"interval_selector.all":        {"All intervals", "全部周期"},
+		"interval_selector.minutes":    {"Minutes", "分钟"},
+		"interval_selector.hours":      {"Hours", "小时"},
+		"interval_selector.days":       {"Days and longer", "日及以上"},
+		"interval_selector.favorite":   {"Add %s to favorites", "收藏 %s"},
+		"interval_selector.unfavorite": {"Remove %s from favorites", "取消收藏 %s"},
+		"chart_type_switcher.label":    {"Chart type", "图表类型"},
+		"chart_type_switcher.type0":    {"Candles", "K 线"},
+		"chart_type_switcher.type1":    {"OHLC", "美国线"},
+		"chart_type_switcher.type2":    {"Line", "折线"},
+		"chart_type_switcher.type3":    {"Area", "面积"},
+		"chart_type_switcher.type4":    {"Heikin-Ashi", "平均 K 线"},
+		"candle_countdown.label":       {"%s candle closes in %s", "%s K 线 %s 后收盘"},
+		"multi_chart_layout.label":     {"Chart layout", "图表布局"},
+		"multi_chart_layout.count":     {"%d charts", "%d 宫格"},
+		"multi_chart_layout.cell":      {"Chart %d %s", "图表 %d %s"},
+		"drawing_toolbar.label":        {"Drawing tools", "画线工具"},
+		"drawing_toolbar.tool0":        {"Select", "选择"},
+		"drawing_toolbar.tool1":        {"Trend line", "趋势线"},
+		"drawing_toolbar.tool2":        {"Horizontal line", "水平线"},
+		"drawing_toolbar.tool3":        {"Fibonacci", "斐波那契"},
+		"drawing_toolbar.tool4":        {"Rectangle", "矩形"},
+		"drawing_toolbar.tool5":        {"Text", "文字"},
+		"drawing_toolbar.lock":         {"Lock drawings", "锁定画线"},
+		"drawing_toolbar.unlock":       {"Unlock drawings", "解锁画线"},
+		"drawing_toolbar.undo":         {"Undo", "撤销"},
+		"drawing_toolbar.clear":        {"Clear drawings", "清除画线"},
+		"indicator_selector.button":    {"Indicators (%d)", "指标（%d）"},
+		"indicator_selector.title":     {"Indicators", "指标"},
+		"indicator_selector.search":    {"Search indicators", "搜索指标"},
+		"indicator_selector.available": {"Available", "可添加"},
+		"indicator_selector.active":    {"On the chart", "已添加"},
+		"indicator_selector.overlay":   {"Over prices", "主图叠加"},
+		"indicator_selector.pane":      {"Own pane", "副图"},
+		"indicator_selector.add":       {"Add", "添加"},
+		"indicator_selector.add_named": {"Add %s", "添加 %s"},
+		"indicator_selector.none":      {"No indicator matches", "没有匹配的指标"},
+		"drawing_tools.note":           {"Note", "标注"},
 	})
 }
diff --git a/multi_chart_layout.go b/multi_chart_layout.go
new file mode 100644
index 0000000..1543892
--- /dev/null
+++ b/multi_chart_layout.go
@@ -0,0 +1,94 @@
+package mujica
+
+import (
+	"fmt"
+	"log/slog"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/internal"
+	"mujicaui/theme"
+)
+
+// ChartCell is one chart of a MultiChartLayout: its symbol, period and view.
+type ChartCell struct {
+	Symbol   string
+	Interval Interval
+	View     MarketView
+}
+
+// MultiChartState is the caller-held grid: how many cells show, all six cells' settings, and the active one.
+type MultiChartState struct {
+	// Count is 1, 2, 4 or 6; zero is 1.
+	Count int
+	// Cells keep their settings while hidden, so changing the layout loses nothing.
+	Cells  [6]ChartCell
+	Active int
+}
+
+// MultiChartLayoutOptions configure a MultiChartLayout.
+type MultiChartLayoutOptions struct {
+	// Height of the grid; zero is 480.
+	Height float32
+}
+
+// MultiChartLayout shows 1, 2, 4 or 6 charts in a grid, each built by cell with its own settings.
+func MultiChartLayout(c *ui.Context, state *MultiChartState, opts MultiChartLayoutOptions, cell func(i int, cell *ChartCell)) ChoiceResult {
+	if state == nil || cell == nil {
+		panic("mujica: MultiChartLayout needs a state and a cell builder")
+	}
+	if state.Count == 0 {
+		state.Count = 1
+	}
+	cols := map[int]int{1: 1, 2: 2, 4: 2, 6: 3}[state.Count]
+	if cols == 0 {
+		panic(fmt.Sprintf("mujica: MultiChartLayout Count %d must be 1, 2, 4 or 6", state.Count))
+	}
+	if state.Active < 0 || state.Active >= state.Count {
+		panic(fmt.Sprintf("mujica: MultiChartLayout Active %d outside %d cells", state.Active, state.Count))
+	}
+	k := Tokens(c)
+	u := Density(c).Unit()
+	h := opts.Height
+	if h == 0 {
+		h = 480
+	}
+	changed := false
+	root := ui.Column(c).Gap(u * 2).FillWidth()
+	root.Children(func() {
+		sel := []int{state.Count}
+		var items []ToggleItem[int]
+		for _, n := range []int{1, 2, 4, 6} {
+			items = append(items, ToggleItem[int]{Value: n, Label: fmt.Sprint(n), Name: fmt.Sprintf(msg(c, "multi_chart_layout.count"), n)})
+		}
+		ui.Row(c).Children(func() {
+			if ToggleGroup(c, &sel, items, ToggleGroupOptions{Label: msg(c, "multi_chart_layout.label")}).Changed() {
+				state.Count, changed = sel[0], true
+				state.Active = min(state.Active, state.Count-1)
+				slog.Debug("mujica: multi_chart_layout count", "count", state.Count)
+			}
+		})
+		rows := (state.Count + cols - 1) / cols
+		grid := ui.Box(c).Grid().Columns(cols).Gap(u * 2).Height(h).FillWidth()
+		grid.Children(func() {
+			for i := range state.Count {
+				box := ui.Column(c).Key(i).MinWidth(0).MinHeight(0).Height((h - u*2*float32(rows-1)) / float32(rows)).Padding(u * 2).
+					Background(k.Surface).Radius(theme.CardRadius).Clip().Role(ui.RoleGroup).
+					Label(fmt.Sprintf(msg(c, "multi_chart_layout.cell"), i+1, state.Cells[i].Symbol))
+				if i == state.Active && state.Count > 1 {
+					box.Border(2, k.AccentText)
+					box.DrawOver(func(p *ui.Painter, r ui.Rect) { internal.Frame(p, r, 3, 5, k.Ornament) })
+				} else {
+					box.Border(theme.BorderWidth, k.Border)
+				}
+				if box.FocusWithin() || box.Clicked() {
+					if state.Active != i {
+						state.Active, changed = i, true
+					}
+				}
+				box.Children(func() { cell(i, &state.Cells[i]) })
+			}
+		})
+	})
+	return ChoiceResult{root, changed}
+}
diff --git a/time_range_selector.go b/time_range_selector.go
new file mode 100644
index 0000000..01e7270
--- /dev/null
+++ b/time_range_selector.go
@@ -0,0 +1,106 @@
+package mujica
+
+import (
+	"fmt"
+	"log/slog"
+	"time"
+
+	"github.com/egoist/mygo/ui"
+)
+
+// RangePreset names a quick time range. The zero value is Range1D.
+type RangePreset int
+
+const (
+	Range1D RangePreset = iota
+	Range5D
+	Range1M
+	Range3M
+	RangeYTD
+	Range1Y
+	Range5Y
+	RangeCustom
+)
+
+var rangePresetNames = []string{"1D", "5D", "1M", "3M", "YTD", "1Y", "5Y"}
+
+// MarketRange is a chosen range: a preset, or Custom with its dates.
+type MarketRange struct {
+	Preset RangePreset
+	// Custom holds the dates when Preset is RangeCustom.
+	Custom DateRange
+}
+
+// Bounds returns the range's start and end at now, in loc; custom ends include their last day.
+func (r MarketRange) Bounds(now time.Time, loc *time.Location) (from, to time.Time) {
+	now = now.In(loc)
+	switch r.Preset {
+	case Range1D:
+		return now.AddDate(0, 0, -1), now
+	case Range5D:
+		return now.AddDate(0, 0, -5), now
+	case Range1M:
+		return now.AddDate(0, -1, 0), now
+	case Range3M:
+		return now.AddDate(0, -3, 0), now
+	case RangeYTD:
+		return time.Date(now.Year(), 1, 1, 0, 0, 0, 0, loc), now
+	case Range1Y:
+		return now.AddDate(-1, 0, 0), now
+	case Range5Y:
+		return now.AddDate(-5, 0, 0), now
+	case RangeCustom:
+		if r.Custom.IsZero() {
+			panic("mujica: custom MarketRange without dates")
+		}
+		s, e := r.Custom.Start, r.Custom.End
+		return time.Date(s.Year, s.Month, s.Day, 0, 0, 0, 0, loc), time.Date(e.Year, e.Month, e.Day, 0, 0, 0, 0, loc).AddDate(0, 0, 1)
+	}
+	panic(fmt.Sprintf("mujica: unknown RangePreset %d", r.Preset))
+}
+
+// TimeRangeSelectorOptions configure a TimeRangeSelector.
+type TimeRangeSelectorOptions struct {
+	Disabled bool
+	// Today marks the calendar's today; zero uses the clock.
+	Today Date
+}
+
+// TimeRangeSelector chooses a preset range or a custom one; the presets are one Tab stop moved with the arrows.
+func TimeRangeSelector(c *ui.Context, value *MarketRange, opts TimeRangeSelectorOptions) ChoiceResult {
+	if value == nil {
+		panic("mujica: TimeRangeSelector needs a value")
+	}
+	if value.Preset < Range1D || value.Preset > RangeCustom {
+		panic(fmt.Sprintf("mujica: unknown RangePreset %d", value.Preset))
+	}
+	if value.Preset == RangeCustom && value.Custom.IsZero() {
+		panic("mujica: custom MarketRange without dates")
+	}
+	items := make([]ToggleItem[RangePreset], len(rangePresetNames)+1)
+	for i, n := range rangePresetNames {
+		items[i] = ToggleItem[RangePreset]{Value: RangePreset(i), Label: n}
+	}
+	items[len(items)-1] = ToggleItem[RangePreset]{Value: RangeCustom, Label: msg(c, "time_range_selector.custom")}
+	changed := false
+	row := ui.Row(c).Gap(Density(c).Unit() * 2).AlignItems(ui.Center).Wrap().Disabled(opts.Disabled)
+	row.Children(func() {
+		sel := []RangePreset{value.Preset}
+		if ToggleGroup(c, &sel, items, ToggleGroupOptions{Label: msg(c, "time_range_selector.label")}).Changed() && !row.IsDisabled() {
+			if sel[0] == RangeCustom && value.Custom.IsZero() {
+				today := datetimeToday(c, opts.Today)
+				value.Custom = DateRange{Start: today.AddMonths(-1), End: today}
+			}
+			value.Preset, changed = sel[0], true
+		}
+		if value.Preset == RangeCustom {
+			if DateRangePicker(c, &value.Custom, DateRangePickerOptions{Today: opts.Today, Max: datetimeToday(c, opts.Today)}).Changed() {
+				changed = true
+			}
+		}
+	})
+	if changed {
+		slog.Debug("mujica: time_range_selector changed", "preset", value.Preset, "custom", value.Custom)
+	}
+	return ChoiceResult{row, changed}
+}