AMIBroker: What are threads per analysis window?

I'm looking for a software that can help me display 5 indicators with varying parameters (RSI default is 14, I want to adjust that number upto 200).

AMIBroker is the most recommended software but are does the RSI indicator have EMA's the way Sharekhan's Trade Tiger's RSI and CCI does?

Icharts has an indicator that I need and the parameters are adjustable but their RSI indicator does not have an EMA.

When I looked at the purchase page for AMIBroker, it said that the basic version has 2 threads per analysis window, what does that mean?

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