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Strategies & Market Trends : Technical Analysis - Beginners
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To: SteelBlueIce who wrote (4265)4/17/1997 11:32:00 PM
From: GW Riedeman   of 12039
 
To amplify what you said about checking the arithmatic -- Don't trust blindly the decisions made by the system testing/exploring capability of your charting/testing program -- they have insidious tricks you must continually watch for.

For example, in WOW, if you have different criteria to, say, go long and exit long, funny things can happen. As a wild example, assume you have chosen an 89 period slope going positive as an enter long point and a five period slope going negative as an exit long point. You will buy in when the 89 slope goes positive and go out very quickly as the short slope goes negative on some normal price variation. You wil NEVER enter long again until the 89 period enter indicator turns negative and then back positive again! You would miss all the rest of the long position. For correct operation of the testing features, ensure that your enter algorithms somehow turn off on any exit and vice versa. The surest way is to write symmetrical criteria, i.e., use the same algorithm for both enter and exit and trigger on exceeding or falling below some calculated value. There are certainly other ways, but in my experience, this has been the simplest and surest.

Don't automatically trust the programmers!!!!!!!! They may know about computers, but.......

Bill
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