I am looking for an indicator that will plot the (open - low)if the low is closest to the open....and the (high-open) if the high is closest to the open.

I would also like to be able to plot a 10 period average of each of these..example: a 10 SMA of open -low...only open minus the low when the open is closest to the low...vice versa for the high - open.

Also is there a way I can plot the weekly open on smaller timeframe charts?

Thank you!