Market or ‘regime’ filtering in Bullcharts

I have a question regarding the specific application of market filters in BullScan and script. 

I’m unsure how I would set up a filter criteria against one particular index and then continue to run that scan based on the outcome of that criteria. 

Take for example the following:

1. Firstly, I want to apply a market-based filter to determine whether I should be buying into the market or not.
1. I want to know when say, the XAO close is above a certain indicator , like the MA or is rising.
2. Secondly, based on the outcome of that result, I want then that scan to meet additional criteria against the universe of stocks that make up that index.
1. So, if the XAO returns a TRUE to the above condition, it would then continue to run the scan against other criteria against the stocks in that index like for example, 15 EMA is rising for the last 3 consecutive bars, or MACD is less than 0 for any of the last 8 bars , or the momentum is highest its been in last 5 bars etc etc.

I imagine I would need some sort of scripting to run this scan, and it’s difficult to reference any material on BC itself on how to run scans against certain symbols or stock codes.