From 07fafdd7fc31f59254d2f496a1773ebdd8581b1c Mon Sep 17 00:00:00 2001
From: Caoyuan Deng <dcaoyuan@gmail.com>
Date: Wed, 4 Mar 2026 19:30:37 -0800
Subject: [PATCH] bar_index extra handling? Just for your consideration. #139

---
 src/PineTS.class.ts        | 6 ++++++
 src/transpiler/settings.ts | 3 +--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/PineTS.class.ts b/src/PineTS.class.ts
index 411d377..78ec6f2 100644
--- a/src/PineTS.class.ts
+++ b/src/PineTS.class.ts
@@ -24,6 +24,7 @@ export class PineTS {
     public hlcc4: any = [];
     public openTime: any = [];
     public closeTime: any = [];
+    public bar_index: any = [];
     //#endregion
 
     //#region run context
@@ -82,6 +83,7 @@ export class PineTS {
                 const _hlcc4 = marketData.map((d) => (d.high + d.low + d.close + d.close) / 4);
                 const _openTime = marketData.map((d) => d.openTime);
                 const _closeTime = marketData.map((d) => d.closeTime);
+                const _bar_index = marketData.map((d, index) => index);
 
                 this.open = _open;
                 this.close = _close;
@@ -94,6 +96,7 @@ export class PineTS {
                 this.hlcc4 = _hlcc4;
                 this.openTime = _openTime;
                 this.closeTime = _closeTime;
+                this.bar_index = _bar_index;
 
                 if (source && (source as IProvider).getSymbolInfo) {
                     const symbolInfo = (source as IProvider)
@@ -482,6 +485,7 @@ export class PineTS {
         this.hlcc4[index] = (candle.high + candle.low + candle.close + candle.close) / 4;
         this.openTime[index] = candle.openTime;
         this.closeTime[index] = candle.closeTime;
+        this.bar_index[index] = index;
     }
 
     /**
@@ -501,6 +505,7 @@ export class PineTS {
         this.hlcc4.push((candle.high + candle.low + candle.close + candle.close) / 4);
         this.openTime.push(candle.openTime);
         this.closeTime.push(candle.closeTime);
+        this.bar_index.push(this.bar_index.length)
     }
 
     /**
@@ -587,6 +592,7 @@ export class PineTS {
         context.data.hlcc4 = new Series([]);
         context.data.openTime = new Series([]);
         context.data.closeTime = new Series([]);
+        context.data.bar_index = new Series([]);
 
         context.length = this.data.length;
 
diff --git a/src/transpiler/settings.ts b/src/transpiler/settings.ts
index 2dd83ec..eb09a71 100644
--- a/src/transpiler/settings.ts
+++ b/src/transpiler/settings.ts
@@ -14,7 +14,7 @@ export const ASYNC_METHODS = ['request.security', 'request.security_lower_tf'];
 export const FACTORY_METHODS = ['line.new', 'line.copy', 'label.new', 'label.copy', 'polyline.new', 'box.new', 'box.copy', 'table.new'];
 
 // All known data variables in the context
-export const CONTEXT_DATA_VARS = ['open', 'high', 'low', 'close', 'volume', 'hl2', 'hlc3', 'ohlc4', 'hlcc4', 'openTime', 'closeTime'];
+export const CONTEXT_DATA_VARS = ['open', 'high', 'low', 'close', 'volume', 'hl2', 'hlc3', 'ohlc4', 'hlcc4', 'openTime', 'closeTime', 'bar_index'];
 
 // All known Pine variables in the context
 export const CONTEXT_PINE_VARS = [
@@ -69,7 +69,6 @@ export const CONTEXT_PINE_VARS = [
     'barstate',
 
     //builtin variables
-    'bar_index',
     'last_bar_index',
     'last_bar_time',
     'inputs',