Combining Study() calls with AND/OR in versions 3.5x beta

["Tomasz Janeczko" <tj@xxxx>]

Hi there,

There is a small problem with combining cross checks for multiple studies.

For example combining 2 study() function crosses with AND/OR:

sell = cross( study("up"), low ) OR cross( study("su"), low ) ;

does not always work correctly. The problem occurs ONLY when using multiple study() function
calls combined with AND/OR in one expression. Expressions using single study call are correct.

As a workaround you should enclose each cross() function with a IsTrue() function that
ensures proper operation.

Example:
sell = IsTrue( cross( study("up"), low ) ) OR IsTrue( cross( study("su"), low ) );

The problem will be fixed in the next release of AmiBroker (full 3.55 release expected this weekend), 
so you will not need the workaround anymore.

Best regards,
Tomasz Janeczko
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