Bug in MQL5 (Backtest Only)

2954

cre8iveq 2018.10.25 14:42

Put this code in the OnInit() function...

nATRHandle = iATR(_Symbol, PERIOD_CURRENT, nATRPeriod);

Comment(CopyBuffer(nATRHandle, 0, 0, 2, arrATR));

If you run this in a live chart, you'll see exactly what you expect... CopyBuffer returns 2. If you run it on a backtest, you'll see CopyBuffer returns -1. An error code. You'll see CopyBuffer returns -1, which is an error code. Why can we not access indicators in OnInit()... wouldn't that be kind of useful? (it took me hours to figure out why this wasn't working)

5265

Anthony Garot 2018.10.25 14:54 #1

cre8iveq:

Why can we not access indicators in OnInit()

https://www.mql5.com/en/forum/227456#comment_6542317

cre8iveq:

wouldn't that be kind of useful?

Maybe.

cre8iveq:

(it took me hours to figure out why this wasn't working)

Sorry that happened. At least you won't do it again.

41514

Alain Verleyen 2018.10.25 15:38 #2

That's not a bug. You have to deal with it, as you can perfectly get the same on a live chart.

2954

cre8iveq 2018.11.13 12:20 #3

The fact that one thing happens on a live chart, and a different thing happens in the backtest makes it a bug. A backtest, by definition is supposed to get the same results as a live test, or as close to it as possible

money management to make Newbie - Can't use Indicators with alerts/signal

Moderator
13504

Marco vd Heijden 2018.11.13 12:26 #4

cre8iveq:
A backtest, by definition is supposed to get the same results as a live test, or as close to it as possible

Who told you that ?

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Alain Verleyen 2018.11.13 15:05 #5

Marco vd Heijden:

Who told you that ?

Please Marco.

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Alain Verleyen 2018.11.13 15:08 #6

cre8iveq:
The fact that one thing happens on a live chart, and a different thing happens in the backtest makes it a bug. A backtest, by definition is supposed to get the same results as a live test, or as close to it as possible

This is not a bug, it's how MT5 is working.

Don't use this code in OnInit(), the tester doesn't have time to launch the indicator.

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