arrowLeft

The arrowLeft method places a left-pointing arrow marker at a specific bar and price. It’s useful to highlight important events, support/resistance reactions, or just to annotate chart zones in a simple and clear way.

Syntax (one line)

arrowLeft(time, price, styles?, text?)

Parameters

time (number) · Candle time where the arrow is placed (e.g., time(0) for current bar). price (number) · Price level where the arrow points (e.g., closeC(0)). styles (ArrowMarkLineToolOverrides) · Look & label options for the marker.

• arrowColor (RGBAColor | BaseColors) · Arrow color (e.g., color.yellow).

• bold (boolean) · Make label text bold.

• color (RGBAColor | BaseColors) · Label text color.

• fontsize (number) · Label font size.

• italic (boolean) · Make label text italic.

• showLabel (boolean) · Show/hide the label text. text (string) · Optional short label shown near the arrow (e.g., "Support").

Return Value

(string) · The drawing ID of the created arrow marker.

Example

What this does: Every 45 candles, it places a yellow left arrow at the current bar close, with a label.

//@version=1
init = () => {
  indicator({ onMainPanel: true, format: 'inherit' });
};

onTick = () => {
  if (index % 45 === 0) { // draw occasionally to keep charts clean
    // 1) Define style once (ArrowMarkLineToolOverrides)
    const style = {
      arrowColor: color.yellow,
      color: color.black,
      fontsize: 12,
      bold: true,
      italic: false,
      showLabel: true
    };

    // 2) Place the arrow
    arrowLeft(time(0), closeC(0), style, "Left mark");
  }
};

Tips

• Use arrows as annotations to make backtests and signals easier to read later.

• Keep label text short so the chart stays clean.

Warning

• Don’t overload the chart with too many markers—this can cause clutter and reduce readability.

Good Practice

• Use color conventions (e.g., yellow arrows for highlights, green for longs, red for shorts) so the meaning is always obvious.