serious backtesting problem

Questions about MultiCharts and user contributed studies.
simon007
Posts: 50
Joined: 12 Apr 2007
Has thanked: 5 times
Been thanked: 1 time

serious backtesting problem

Postby simon007 » 05 Oct 2010

I found out the following;

When backtesting with 2 data series of the same symbol, data1 based on daily bars and data 2 based on 15 minute bars, the backtesting routines use the daily close during the day(in simulation). The problem is that this close value in reality is not know before the end of the day. Instead of using the daily close value for the daily bars it should use the close of the intraday bars for the daily bars. If you don't do it this way you get a big difference between backtesting and real trading.

tcat
Posts: 158
Joined: 02 Feb 2008
Location: Lausanne, Switzerland
Has thanked: 9 times
Been thanked: 4 times

Re: serious backtesting problem

Postby tcat » 06 Oct 2010

You need to reverse your instruments.

Put the higher frequency timeframe as data1, and use intrabarpersist for all indicators that refer to data2 or above.

simon007
Posts: 50
Joined: 12 Apr 2007
Has thanked: 5 times
Been thanked: 1 time

Re: serious backtesting problem

Postby simon007 » 06 Oct 2010

Hi Tcat,

Thanks for the tip, I'm gonna give it a try.

Best regards,

Simon


Return to “MultiCharts”