Full Examples

about { author: "CoreXTrader"; version: "1.0.0"; }
parameters { int period = 14; double overbought = 70.0; double oversold = 30.0; }

struct RSIResult { double value; double level_ob; double level_os; }

display {
  separate_window: true; outputs: 3
  RSIResult.value    { type: "line"; color: "#dc2626ff"; name: "RSI"; width: 2; };
  RSIResult.level_ob { type: "line"; color: "#f97316aa"; name: "Overbought"; width: 1; };
  RSIResult.level_os { type: "line"; color: "#22c55eaa"; name: "Oversold"; width: 1; };
}

series double rsi_vals[]; series double ob_line[]; series double os_line[];

calculate() {
  double closes[] = close();
  int len = length(closes);
  int start = Chart.resume_index > 0 ? Chart.resume_index - 1 : period;
  rsi_vals[] = create_array(len); ob_line[] = create_array(len); os_line[] = create_array(len);

  for (int i = start; i < len; i = i + 1) {
    double gain = 0.0; double loss = 0.0;
    for (int j = 1; j <= period; j = j + 1) {
      double diff = closes[i - j + 1] - closes[i - j];
      if (diff > 0.0) { gain = gain + diff; } else { loss = loss - diff; }
    }
    double avg_gain = gain / period; double avg_loss = loss / period;
    rsi_vals[i] = avg_loss == 0.0 ? 100.0 : 100.0 - (100.0 / (1.0 + avg_gain / avg_loss));
    ob_line[i] = overbought; os_line[i] = oversold;
  }
  return RSIResult { value: rsi_vals, level_ob: ob_line, level_os: os_line };
}