Price trend indicator

 

Please help me in finding

an Indicator which plots price line as an trend line on an overlay in sub-window .

The idea is to select two vertical datelines on the indicator and plot the price (Open, close, high, low any one selected by the user) on the sub-window.

the objective is to find a pattern or symmetry between two price movements . sort of a price curve.

Picture is attached. 

Reason: