Crosshair & legend

subscribeCrosshairMove fires the hovered bar of the primary price series on every cursor move (and all-null fields on pointer-leave), so your app renders the legend or tooltip in its own DOM - the engine never imposes a legend style.

const unsub = chart.subscribeCrosshairMove((e) => {
  const bar = e.bar ?? bars.at(-1);     // e.bar is null when the cursor leaves
  legendEl.textContent = bar
    ? `O ${bar.open} H ${bar.high} L ${bar.low} C ${bar.close}`
    : '';
  // e.point gives container-relative px to position a floating tooltip
});

Live OHLC legend

Hover the chart - the legend in the top-left tracks the bar under the crosshair:

const chart = lib.createChart(el);
const bars = lib.generateBars(1700000000, 160, 3600);
chart.addSeries('candlestick').setData(bars);

el.style.position = 'relative';
const legend = document.createElement('div');
legend.style.cssText = 'position:absolute;left:12px;top:10px;z-index:4;font:600 12px ui-monospace,monospace;color:light-dark(#151515,#cbd5e1);pointer-events:none';
el.appendChild(legend);

function render(b) {
legend.textContent = b
  ? ('O ' + b.open.toFixed(2) + '   H ' + b.high.toFixed(2) + '   L ' + b.low.toFixed(2) + '   C ' + b.close.toFixed(2))
  : '';
}
render(bars[bars.length - 1]);
chart.subscribeCrosshairMove(function (e) { render(e.bar || bars[bars.length - 1]); });

chart.timeScale.fitContent(bars.length);
return chart;

The crosshair itself is global (a thin vertical line across all panes) with price and time axis tags. Its time tag shows seconds on sub-minute timeframes.

Collapse indicator legends

chart.setIndicatorLegendCollapsed(true);
chart.indicatorLegendCollapsed(); // true

The constructor option indicatorLegendCollapsed defaults to false. Collapse suppresses study legend rows and their hit areas across panes. The persistent Indicators N control on the price pane expands them with a click or touch. The count includes every applied study, including individually hidden ones, and disappears when no studies remain. Expanded legends retain a control for collapsing them again.

Plots, study visibility, calculations, live subscriptions and alerts stay active. Host OHLC and custom legend rows retain their display. The count respects the reserved legendOffset, follows the price pane when it is moved below its studies, and follows the top visible pane when a study pane is maximized over it.

Both hosts expose Collapse indicator legends in Readout settings for keyboard access. The stable schema key is statusLine.indicatorsCollapsed. Native chart state and portable workspaces retain this chart-local preference; study templates do not replace it and appearance linking does not synchronize it.