[amibroker] How do I get current bar index as a scaler?

["Mike" <sfclimbers@xxxxxxxxx>]

Does anyone have an easy way to get the current bar index as a scaler? 

I find that I often want to dereference an array to get a scaler, but 
don't know of an easy way (aside from looping) to get the current bar 
index.

For example; How would I figure out 'x' in the snippet below without 
looping:

Count = BarsSince(Buy);
Value = stdev(Close, Count[x]);

The above is just a meaningless example. The array to dereference does 
not have to be BarsSince, and the function could be any function 
taking a scaler.

Thanks. 



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