How to find the opening prices of end orders (highest and lowest)

[OntradingX]

As shown in the image below, I would like to know if anyone has any idea how I can easily locate the opening price of the order that is highest and the order that is lowest. Can anyone give me an example of how to do this, I want to save these 2 prices in a variable but I can't find the best way to locate them

[jstap]

Reset variable to 0-loop through orders-check if < or >- save price if < or > in the variable

[OntradingX]

@jstap
I managed to do it using the trading bucket. Thanks for your help friend