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Bollinger Band Width Check
this is my first post here. I learned a lot from other posts but could not find the answer to my problem.
I am trying to check the width (or range?) of the Bollinger Bands of monthly RSIs against past 20 periods. Basically I am trying to find if the "Monthly Upper BB - Monthly Lower BB > Average of the past 20 period (Monthly Upper BB - Monthly Lower BB)".
Here is what I have so far. I don't receive a syntax error however this scan returns zero results but I know that it should return at least 1 result (looking at the chart visually within the scanned time interval).
What am I doing wrong?
[[last month's Monthly Upper BB(20,2.0,last month's Monthly RSI(14)) - last month's Monthly Lower BB(20,2.0,last month's Monthly RSI(14))] < [last month's monthly SMA(20,[2 months ago Monthly Upper BB(19,2.0,2 months ago Monthly RSI(14)) - 2 months ago Monthly Lower BB(20,2.0,2 months ago Monthly RSI(14))])]]
Any help is appreciated!