feature

Price and bar data

When an indicator or definition runs, each bar hands you open, high, low, close, volume, and time on ctx — the raw market data your logic reads.

You need this page whenever you calculate from price or volume, or when you switch to volume-candle / tape data via dataSource. Studies do not use this same bar ctx; they use candle helpers instead.

Quick reference

Field	Indicator	Definition	Notes
`open` / `high` / `low` / `close`	yes	yes	OHLC
`volume`	yes	yes
`volumeBid` / `volumeAsk`	yes	—	When dataSource supports it
`priceLevels`	yes	yes	Tape / volume-candle levels
`time`	yes	yes	Bar time
`barIndex`	yes	yes	Index in series
`params`	yes	yes	Resolved settings

dataSource

Set on meta:

meta({
  shortName: "VWAP",
  kind: "overlay", // indicator
  dataSource: { type: "candles" },
});

Use { type: "volume-candles", settings: { purgeStrategy: "floor-aware" } } (or equivalent) when you need tape / priceLevels. Default is ordinary candles.

Studies

Studies do not expose the same bar ctx on onEvent. Use ctx.candles.forward / window / timeOf — see Results and stats.

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