Backtester not using whole history data?

Adam Parusel
59
Adam Parusel  

I hope you can help me understanding why the backtester does not use the whole available historical data?

My system works on the German 30 (DAX). In order to have a lot of historical data, I downloaded and converted the data from Yahoo Finance: http://finance.yahoo.com/q/hp?s=^GDAXI

The System I am using, only acts on opening of a new bar, so it is ok to set the testing method to open bars only. Now, what I find strange is, that I want to backtest the system from 01/01/1991 until 2010. The data is available in the history center (see attached screenshot). But as soon as I start the backtest, it starts at 04/24/1991, so nearly five months later - how come that? Any ideas?




[Deleted]  
adamp:

I hope you can help me understanding why the backtester does not use the whole available historical data?

My system works on the German 30 (DAX). In order to have a lot of historical data, I downloaded and converted the data from Yahoo Finance: https://www.mql5.com/go?link=http://finance.yahoo.com/q/hp?s=^GDAXI

The System I am using, only acts on opening of a new bar, so it is ok to set the testing method to open bars only. Now, what I find strange is, that I want to backtest the system from 01/01/1991 until 2010. The data is available in the history center (see attached screenshot). But as soon as I start the backtest, it starts at 04/24/1991, so nearly five months later - how come that? Any ideas?





Have you check or try to increase your 2 MT4 parameters Max Bar ?
Adam Parusel
59
Adam Parusel  

Max bars in history is set to 512,000 - max bars in chart is set to 65,000. So this should not be the reason. But thank you for your help.

It's not crucial, I was just wondering if you also experienced something like that?

[Deleted]  
adamp:

Max bars in history is set to 512,000 - max bars in chart is set to 65,000. So this should not be the reason. But thank you for your help.

It's not crucial, I was just wondering if you also experienced something like that?


Yes, but 65,000 ou 512.000 is the problem. Increase, restart MT4 and shoot again :)
Adam Parusel
59
Adam Parusel  
Matutin:

Yes, but 65,000 ou 512.000 is the problem. Increase, restart MT4 and shoot again :)

65,000 should be enough. I have backtested in daily chart. So even if there were 365 trading days per year, then 65,000 days would be ~180 years ;)

The total history for the instrument I've tested is below 5.000 bars.

William Roeder
23743
William Roeder  
adamp:
to backtest the system from 01/01/1991 until 2010. The data is available in the history center (see attached screenshot). But as soon as I start the backtest, it starts at 04/24/1991, so nearly five months later - how come that? Any ideas?
The tester doesn't use the first 100 bars. 4/24-1/1 looks like ~100 days to me