ta.ema#

Exponential moving average over values ending at index i.

SYNTAX#

function ta.ema(values: (number | null)[], length: number, i: number): number | null

ARGUMENTS#

values ((number | null)[]) — Series of input values, oldest-first.
length (number) — Smoothing period. Must be positive.
i (number) — Current bar index.

RETURNS#

number | null — EMA value, or null during warmup or on missing data.

REMARKS#

First valid output is at i = length - 1 (matches ta.sma for that bar). Any null/NaN value in the warmup window propagates; subsequent bars also propagate null on missing inputs.

EXAMPLE#

const closes = [];
function onBar(i, ctx) {
  closes[i] = candles[i].close;
  const ema20 = ta.ema(closes, 20, i);
  const ema50 = ta.ema(closes, 50, i);
  if (ema20 !== null) plot('ema20', ema20, { color: '#26a69a' });
  if (ema50 !== null) plot('ema50', ema50, { color: '#ef5350' });
}