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fix(indicators): BUGFIX: Prevent array out of range on TF switch

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This commit is contained in:
Toh4iem9
2026-03-17 10:16:14 +01:00
parent f9649c93db
commit 0c1e4ebda5
1 changed files with 15 additions and 12 deletions
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Indicators/MyIndicators/VWAP_History_Levels.mq5
+15 -12
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@@ -3,7 +3,7 @@
//| Copyright 2026, xxxxxxxx| //| Copyright 2026, xxxxxxxx|
//+------------------------------------------------------------------+ //+------------------------------------------------------------------+
#property copyright "Copyright 2026, xxxxxxxx" #property copyright "Copyright 2026, xxxxxxxx"
#property version "2.10" // Optimized Calculation Loop #property version "2.11" // BUGFIX: Prevent array out of range on TF switch
#property description "Draws Historical VWAP Close Levels as Support/Resistance." #property description "Draws Historical VWAP Close Levels as Support/Resistance."
#property indicator_chart_window #property indicator_chart_window
@@ -54,7 +54,7 @@ int OnInit()
} }
//+------------------------------------------------------------------+ //+------------------------------------------------------------------+
//| | //| Deinit |
//+------------------------------------------------------------------+ //+------------------------------------------------------------------+
void OnDeinit(const int r) void OnDeinit(const int r)
{ {
@@ -107,9 +107,7 @@ int OnCalculate(const int rates_total,
} }
// 1. Calculate VWAP History // 1. Calculate VWAP History
// Note: The Calculator Engine usually iterates from start_index to end. // Note: The Calculator Engine iterates safely from 0 if required.
// We can pass start_loop to it.
double odd[], even[]; double odd[], even[];
if(InpShowDaily) if(InpShowDaily)
@@ -131,13 +129,14 @@ int OnCalculate(const int rates_total,
} }
// 2. Manage Objects // 2. Manage Objects
// Only scan from start_loop, but start_loop is usually total-1 (Live).
// Historical objects must be created on Full Recalculation (prev==0).
// OPTIMIZATION: Don't check objects on every tick if not needed. // OPTIMIZATION: Don't check objects on every tick if not needed.
// Only check if new candle or full recalc. // Only check if new candle or full recalc.
for(int i = start_loop; i < rates_total; i++) // CRITICAL FIX: To prevent "Array out of range" when querying [i-1],
// the object scanner must start at minimum index 1.
int start_obj = (start_loop == 0) ? 1 : start_loop;
for(int i = start_obj; i < rates_total; i++)
{ {
MqlDateTime dt, dt_prev; MqlDateTime dt, dt_prev;
TimeToStruct(time[i], dt); TimeToStruct(time[i], dt);
@@ -168,6 +167,10 @@ int OnCalculate(const int rates_total,
return(rates_total); return(rates_total);
} }
//+------------------------------------------------------------------+
//| Helpers |
//+------------------------------------------------------------------+
// Updated MergeBuffer to respect start index // Updated MergeBuffer to respect start index
void MergeBuffers(int total, const double &src1[], const double &src2[], double &dst[], int start) void MergeBuffers(int total, const double &src1[], const double &src2[], double &dst[], int start)
{ {
@@ -181,7 +184,7 @@ void MergeBuffers(int total, const double &src1[], const double &src2[], double
} }
//+------------------------------------------------------------------+ //+------------------------------------------------------------------+
//| Helpers | //| |
//+------------------------------------------------------------------+ //+------------------------------------------------------------------+
void MergeBuffers(int total, const double &src1[], const double &src2[], double &dst[]) void MergeBuffers(int total, const double &src1[], const double &src2[], double &dst[])
{ {
@@ -195,7 +198,7 @@ void MergeBuffers(int total, const double &src1[], const double &src2[], double
} }
//+------------------------------------------------------------------+ //+------------------------------------------------------------------+
//| | //| Object Creation Logic |
//+------------------------------------------------------------------+ //+------------------------------------------------------------------+
void CreateLevelObject(datetime time_start, double price, string suffix, color clr, int limit_count) void CreateLevelObject(datetime time_start, double price, string suffix, color clr, int limit_count)
{ {
@@ -229,7 +232,7 @@ void CreateLevelObject(datetime time_start, double price, string suffix, color c
} }
//+------------------------------------------------------------------+ //+------------------------------------------------------------------+
//| | //| Garbage Collection (Clears old lines to keep chart clean) |
//+------------------------------------------------------------------+ //+------------------------------------------------------------------+
void CleanOldObjects(string prefix, int max_count) void CleanOldObjects(string prefix, int max_count)
{ {