STOCHRSI (Stochastic RSI)

Stochastic RSI applies the Stochastic Oscillator formula to RSI values instead of price. This creates a more sensitive indicator that reaches overbought/oversold more frequently than standard RSI.

Declaration

function init(ctx) {
  ctx.indicator('stochRsi', 'STOCHRSI', { 
    rsiPeriod: 14, 
    stochPeriod: 14, 
    kPeriod: 3, 
    dPeriod: 3 
  });
}

Options

Option	Type	Default	Description
`rsiPeriod`	`number`	14	RSI calculation period
`stochPeriod`	`number`	14	Stochastic lookback period
`kPeriod`	`number`	3	%K smoothing period
`dPeriod`	`number`	3	%D smoothing period

Output

Returns an object with two series, accessed via underscore naming:

Property	Description
`k`	%K line (smoothed stochastic RSI)
`d`	%D line (smoothed %K)

Accessing Values

function onBar(ctx, i) {
  const k = ctx.ind.stochRsi_k[i];
  const d = ctx.ind.stochRsi_d[i];
}

Use Cases

Sensitive Reversal Detection

function onBar(ctx, i) {
  const k = ctx.ind.stochRsi_k[i];
  
  // StochRSI reaches extremes more often than plain RSI
  if (k < 0.1) {
    ctx.order.market('ASSET', 1, { signal: 'buy', reason: 'stochrsi_extreme_low' });
  }
  if (k > 0.9) {
    ctx.order.close('ASSET', { signal: 'sell', reason: 'stochrsi_extreme_high' });
  }
}

Calculation

Compute RSI
Apply stochastic formula: $StochRSI = \frac{RSI - Lowest(RSI)}{Highest(RSI) - Lowest(RSI)}$
%K = SMA(StochRSI, kPeriod)
%D = SMA(%K, dPeriod)

RSI - Standard RSI
STOCH - Standard stochastic oscillator
Williams %R - Range-based oscillator