Hi
The attached screenshot of a trigger shows average wom over the number of refreshes count.
1st column is sel_wom
2nd column is refresh counter
3rd column is average wom
then use conditions or a trigger to sample the average according to the time you want and your refresh rate.
e.g. if refresh rate is 2 secs and timeframe required is every 10 mins
then you would read avg_wom (or trigger a bet) when counter is at 300, 600, 900 etc and avg_wom is within your required range