Function formatTooltipItem

src/components/formatTooltip.ts:147–152

(params: TooltipParams)

 * For candlestick series, returns O/H/L/C with arrow and percentage change.
 */
export function formatTooltipItem(params: TooltipParams): string {
  if (isCandlestickValue(params.value)) {
    return formatCandlestickTooltip(params);
  }
  return formatRowHtml(params, formatNumber(params.value[1]));
}

/**
 * Default tooltip formatter for axis mode.