How to find Highest / Lowest in a period (eg. 2 days, 3 days..)

[migen]

I need to find Highest and Lowest price in a period, example : Highest / Lowest in 2 days, 3 days... and put it in a variable to do comparison in Condition block.

Example Highest and Lowest in 2 Days
Put Highest in H2 variable
Put Lowest in L2 variable

But I still don't find how to do that, do you have any suggestions ?

[migen]

I have just find out - Market Properties / Highest Price (Candles Period) in Condition block.