Documentation/AlgoCode/Function reference
paint
Optional bar-background tint. Use inside when, or paint … when … on one line.
paint green paint green when bullish
Same color names as plot. Does not replace the Buy/Sell/Exit arrow. Inside a when body it only paints bars where the condition is true. One-liner: paint green when close is above ema(21). Prefer mask for split-color Supertrend / MA lines instead of painting the whole chart.
Return value
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Example
when bullish paint green when bearish paint red
