Pierre Rougier: With F5, Debugging, I got the following error message " Array out of range". Why ?
MqlRates PriceData[]; double dOpen=PriceData[1].open;
The array is zero size and you are trying to access the second element.
whroeder1:
The array is zero size and you are trying to access the second element.
True.
But why the array is empty ?
With Bars I got 37655.
//+------------------------------------------------------------------+ //| TestBars.mq5 | //| Pierre Rougier | //| https://www.mql5.com | //+------------------------------------------------------------------+ #property copyright "Pierre Rougier" #property link "https://www.mql5.com" #property version "1.00" //+------------------------------------------------------------------+ //| Script program start function | //+------------------------------------------------------------------+ void OnStart() { MqlRates PriceData[]; ArraySetAsSeries(PriceData,true); int iSizePriceData=ArraySize(PriceData); Alert("iSizePriceData :"+iSizePriceData); Alert("Bars(_Symbol,_Period)"+Bars(_Symbol,_Period)); //double dOpen=PriceData[1].open; // Alert("dOpen :"+dOpen); } //+------------------------------------------------------------------+
Pierre Rougier:
But why the array is empty ?
You must fill the array before you can use it.
Look to the CopyRates() function.
Thanks Anthony !
it has nothing to do with the question, but I also wonder what TERMINAL_MAXBARS is for.
//+------------------------------------------------------------------+ //| TestBars.mq5 | //| Pierre Rougier | //| https://www.mql5.com | //+------------------------------------------------------------------+ #property copyright "Pierre Rougier" #property link "https://www.mql5.com" #property version "1.00" //+------------------------------------------------------------------+ //| Script program start function | //+------------------------------------------------------------------+ void OnStart() { MqlRates PriceData[]; ArraySetAsSeries(PriceData,true); int iSizePriceData=ArraySize(PriceData); Alert("iSizePriceData :"+IntegerToString(iSizePriceData)); Alert("TERMINAL_MAXBARS :"+IntegerToString(TERMINAL_MAXBARS)); Alert("Bars(_Symbol,_Period)"+IntegerToString(Bars(_Symbol,_Period))); int copied=CopyRates(_Symbol,_Period,Bars(_Symbol,_Period)-1,1,PriceData); double dOpen=PriceData[0].open; Alert("dOpen :"+DoubleToString(dOpen)); Alert("TERMINAL_MAXBARS :"+IntegerToString(TERMINAL_MAXBARS)); Alert("-----------------------------"); } //+------------------------------------------------------------------+
Pierre Rougier: it has nothing to do with the question,
It has everything to do with the question. You declared an array, never gave it a size or filled it, so it is empty.Pierre Rougier: But why the array is empty ?
Bars has nothing to do with your empty array. If you buy a bucket from a hard ware shop, to you think it fills itself?
With Bars I got 37655.
You have to give it it's target size before working with it:
ArrayResize(....
Pierre Rougier:
. . . but I also wonder what TERMINAL_MAXBARS is for.
. . . but I also wonder what TERMINAL_MAXBARS is for.
Tools > Options > Charts > "Max bars in chart"
See this post: https://www.mql5.com/en/forum/21019
![max bars in chart max bars in chart](/i/community/logo_mql5_small.png)
max bars in chart
- 2014.02.25
- www.mql5.com
How to get number of max bars in chart? Chart Properties?https://www.mql5.com/en/docs/constants/chartconstants/enum_chart_property...
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Hello,
[MQL5]
I try this script.
With F5, Debugging, I got the following error message " Array out of range".
Why ?
Thanks in advance,
Pierre