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— But my approach is not correct, i am trying to figure out how to solve this formula

— HAO

— I tought at first that opens[-2] would do the trick but i need to do it recursively trough all the list

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— So i think i need an aditional forloop

— Use simple list comprehension

— Much easier to read and write

— Yes i've found solution using forloop

— 

    hsopens=[(opens[i-1] + closes[i-1])/2 for i, x in enumerate(opens) if i > 0]

— A friend of other group helped

— Good

— I am now in another subject