Dear Mntiwana,
Thank you for your reply. I am attaching the requested picture. The requested Indicator, must show, in separate window, two lines. One line will represent the "Biggest Body Size" and the other will draw the "Lowest Body Size", for the requested period of time, in our case period is 20. So we must find the Biggest and the Smallest BODY for the period (Bars) we are interested. The lines will represent the "Biggest" and the "Smallest" Body Size for the requested period. Hope it is enough clear, in case there is any additional question please ask ....
Thank you any way for your cooperation and interest.
Best Regards
Dimitri