feat: integrate RSI divergence pane into Fast EMA Scalper

Author: dharmanan

lib/compiler-v14.ts

@@ -0,0 +1,122 @@
+import { compilePine as compileBase } from "./compiler-v13";
+import type { StrategyConfig } from "./types";
+
+const appendForceOverlay = (line: string): string => {
+  if (line.includes("force_overlay=")) return line;
+  return `${line.slice(0, -1)}, force_overlay=true)`;
+};
+
+export function compilePine(config: StrategyConfig): string {
+  let code = compileBase(config);
+  const useIntegratedRsiPane = config.name === "Fast EMA Scalper" && config.outputMode === "indicator";
+
+  if (!useIntegratedRsiPane) return code;
+
+  const declaration = `indicator("${config.name}", overlay=true, max_labels_count=500, max_lines_count=500)`;
+  const paneDeclaration = `indicator("${config.name}", overlay=false, max_labels_count=500, max_lines_count=500)`;
+  if (!code.includes(declaration)) {
+    throw new Error("Compiler transform anchor missing: Fast EMA Scalper indicator declaration");
+  }
+  code = code.replace(declaration, paneDeclaration);
+
+  let overlayVisuals = 0;
+  code = code.replace(/^(bgcolor|plot)\(.*\)$/gm, (line) => {
+    overlayVisuals += 1;
+    return appendForceOverlay(line);
+  });
+
+  code = code.replace(/^\s*label\.new\(.*\)$/gm, (line) => {
+    overlayVisuals += 1;
+    return appendForceOverlay(line);
+  });
+
+  if (config.execution.showDashboard) {
+    const tablePattern = /var table dashboard = table\.new\(position\.top_right, 2, (\d+), border_width=1\)/;
+    if (!tablePattern.test(code)) {
+      throw new Error("Compiler transform anchor missing: Fast EMA Scalper dashboard table");
+    }
+    code = code.replace(
+      tablePattern,
+      "var table dashboard = table.new(position.top_right, 2, $1, border_width=1, force_overlay=true)"
+    );
+  }
+
+  if (overlayVisuals === 0) {
+    throw new Error("Compiler transform anchor missing: Fast EMA Scalper overlay visuals");
+  }
+
+  const alertsAnchor = "// === Alerts ===";
+  if (!code.includes(alertsAnchor)) {
+    throw new Error("Compiler transform anchor missing: alerts section");
+  }
+
+  const divergencePane = `// === Integrated RSI divergence pane ===
+divRsiLength = input.int(14, "Divergence RSI period", minval=1)
+divPivotLeft = input.int(5, "Divergence pivot left", minval=1)
+divPivotRight = input.int(5, "Divergence pivot right", minval=1)
+divRangeMinimum = input.int(5, "Divergence minimum pivot range", minval=1)
+divRangeMaximum = input.int(60, "Divergence maximum pivot range", minval=2)
+showRegularBullDiv = input.bool(true, "Show regular bullish divergence")
+showHiddenBullDiv = input.bool(true, "Show hidden bullish divergence")
+showRegularBearDiv = input.bool(true, "Show regular bearish divergence")
+showHiddenBearDiv = input.bool(true, "Show hidden bearish divergence")
+
+divRsi = ta.rsi(close, divRsiLength)
+divRegularBullColor = color.green
+divRegularBearColor = color.red
+divHiddenBullColor = color.new(color.green, 35)
+divHiddenBearColor = color.new(color.red, 35)
+divTransparentColor = color.new(color.white, 100)
+
+plot(divRsi, "RSI divergence", linewidth=2, color=color.rgb(41, 98, 255))
+divMiddleLine = hline(50, "RSI middle", color=color.rgb(120, 123, 134), linestyle=hline.style_dotted)
+divOverboughtLine = hline(70, "RSI overbought", color=color.rgb(120, 123, 134), linestyle=hline.style_dotted)
+divOversoldLine = hline(30, "RSI oversold", color=color.rgb(120, 123, 134), linestyle=hline.style_dotted)
+fill(divOverboughtLine, divOversoldLine, "RSI divergence background", color=color.rgb(33, 150, 243, 90))
+
+divPivotLowFound = not na(ta.pivotlow(divRsi, divPivotLeft, divPivotRight))
+divPivotHighFound = not na(ta.pivothigh(divRsi, divPivotLeft, divPivotRight))
+
+divInRange(condition) =>
+    divBarsSince = ta.barssince(condition)
+    divRangeMinimum <= divBarsSince and divBarsSince <= divRangeMaximum
+
+divPreviousLowInRange = divInRange(divPivotLowFound[1])
+divRsiHigherLow = divRsi[divPivotRight] > ta.valuewhen(divPivotLowFound, divRsi[divPivotRight], 1) and divPreviousLowInRange
+divPriceLowerLow = low[divPivotRight] < ta.valuewhen(divPivotLowFound, low[divPivotRight], 1)
+divRegularBullAlert = divPriceLowerLow and divRsiHigherLow and divPivotLowFound
+divRegularBull = showRegularBullDiv and divRegularBullAlert
+plot(divPivotLowFound ? divRsi[divPivotRight] : na, offset=-divPivotRight, title="Regular bullish divergence", linewidth=2, color=divRegularBull ? divRegularBullColor : divTransparentColor)
+plotshape(divRegularBull ? divRsi[divPivotRight] : na, offset=-divPivotRight, title="Regular bullish label", text="Bull", style=shape.labelup, location=location.absolute, color=divRegularBullColor, textcolor=color.white)
+
+divRsiLowerLow = divRsi[divPivotRight] < ta.valuewhen(divPivotLowFound, divRsi[divPivotRight], 1) and divPreviousLowInRange
+divPriceHigherLow = low[divPivotRight] > ta.valuewhen(divPivotLowFound, low[divPivotRight], 1)
+divHiddenBullAlert = divPriceHigherLow and divRsiLowerLow and divPivotLowFound
+divHiddenBull = showHiddenBullDiv and divHiddenBullAlert
+plot(divPivotLowFound ? divRsi[divPivotRight] : na, offset=-divPivotRight, title="Hidden bullish divergence", linewidth=2, color=divHiddenBull ? divHiddenBullColor : divTransparentColor)
+plotshape(divHiddenBull ? divRsi[divPivotRight] : na, offset=-divPivotRight, title="Hidden bullish label", text="H Bull", style=shape.labelup, location=location.absolute, color=divHiddenBullColor, textcolor=color.white)
+
+divPreviousHighInRange = divInRange(divPivotHighFound[1])
+divRsiLowerHigh = divRsi[divPivotRight] < ta.valuewhen(divPivotHighFound, divRsi[divPivotRight], 1) and divPreviousHighInRange
+divPriceHigherHigh = high[divPivotRight] > ta.valuewhen(divPivotHighFound, high[divPivotRight], 1)
+divRegularBearAlert = divPriceHigherHigh and divRsiLowerHigh and divPivotHighFound
+divRegularBear = showRegularBearDiv and divRegularBearAlert
+plot(divPivotHighFound ? divRsi[divPivotRight] : na, offset=-divPivotRight, title="Regular bearish divergence", linewidth=2, color=divRegularBear ? divRegularBearColor : divTransparentColor)
+plotshape(divRegularBear ? divRsi[divPivotRight] : na, offset=-divPivotRight, title="Regular bearish label", text="Bear", style=shape.labeldown, location=location.absolute, color=divRegularBearColor, textcolor=color.white)
+
+divRsiHigherHigh = divRsi[divPivotRight] > ta.valuewhen(divPivotHighFound, divRsi[divPivotRight], 1) and divPreviousHighInRange
+divPriceLowerHigh = high[divPivotRight] < ta.valuewhen(divPivotHighFound, high[divPivotRight], 1)
+divHiddenBearAlert = divPriceLowerHigh and divRsiHigherHigh and divPivotHighFound
+divHiddenBear = showHiddenBearDiv and divHiddenBearAlert
+plot(divPivotHighFound ? divRsi[divPivotRight] : na, offset=-divPivotRight, title="Hidden bearish divergence", linewidth=2, color=divHiddenBear ? divHiddenBearColor : divTransparentColor)
+plotshape(divHiddenBear ? divRsi[divPivotRight] : na, offset=-divPivotRight, title="Hidden bearish label", text="H Bear", style=shape.labeldown, location=location.absolute, color=divHiddenBearColor, textcolor=color.white)
+
+alertcondition(divRegularBullAlert, "Regular bullish divergence", "A new regular bullish RSI divergence was confirmed.")
+alertcondition(divHiddenBullAlert, "Hidden bullish divergence", "A new hidden bullish RSI divergence was confirmed.")
+alertcondition(divRegularBearAlert, "Regular bearish divergence", "A new regular bearish RSI divergence was confirmed.")
+alertcondition(divHiddenBearAlert, "Hidden bearish divergence", "A new hidden bearish RSI divergence was confirmed.")
+
+`;
+
+  return code.replace(alertsAnchor, divergencePane + alertsAnchor);
+}