ExoScope RSI Divergence

const rsiLen = input('rsi_period', 14, { min: 2, max: 50 });
const pivotLen = input('pivot_lookback', 5, { min: 2, max: 20 });
const minGap = input('min_gap', 8, { min: 3, max: 30 });

const rsiVal = ta.rsi(close, rsiLen);
const pLow = ta.pivotLow(low, pivotLen, pivotLen);
const pHigh = ta.pivotHigh(high, pivotLen, pivotLen);

let lastLowBar = -1, lastLowPrice = 0, lastLowRSI = 0;
let lastHighBar = -1, lastHighPrice = 0, lastHighRSI = 0;
let lastSignal = -minGap;

for (let i = pivotLen; i < barCount - pivotLen; i++) {
  if (i - lastSignal < minGap) continue;
  if (pLow[i] !== null && rsiVal[i] !== null) {
    if (lastLowBar >= 0 && low[i] < lastLowPrice && rsiVal[i] > lastLowRSI) {
      signal(i, 'buy', low[i], 'Bull div');
      lastSignal = i;
    }
    lastLowBar = i;
    lastLowPrice = low[i];
    lastLowRSI = rsiVal[i];
  }
  if (pHigh[i] !== null && rsiVal[i] !== null) {
    if (lastHighBar >= 0 && high[i] > lastHighPrice && rsiVal[i] < lastHighRSI) {
      signal(i, 'sell', high[i], 'Bear div');
      lastSignal = i;
    }
    lastHighBar = i;
    lastHighPrice = high[i];
    lastHighRSI = rsiVal[i];
  }
}