In the documentation, it only talks about double variables as being passed from indicator back to calling EA. Can one simply declare these variables as strings, ie 'string ExtMapBuffer[]' in the indicator?
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Joined Oct 2006
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Status: Friendly Neighborhood Programmer
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bool SetIndexBuffer( int index, double array[])
Binds the array variable declared at a global level to the custom indicator pre-defined buffer. The amount of buffers needed to calculate the indicator is set with the IndicatorBuffers() function and cannot exceed 8. If it succeeds, TRUE will be returned, otherwise, it will be FALSE. To get the extended information about the error, one has to call the GetLastError() function.
double iCustom( string symbol, int timeframe, string name, ..., int mode, int shift)
Calculates the specified custom indicator and returns its value. The custom indicator must be compiled (*.EX4 file) and be in the terminal_directory\experts\indicators directory.
The indicator expects an array of doubles to be used as an index buffer and the iCustom function expects (and returns) a double value. If you're going to pass a string value out of an indicator, you're going to have to be really creative about it.
