As far as I know:
OrderAction.SellShort - is used for opening a Short position;
OrderAction.Sell - is used for closing a Long position;
Is this correct?
I believe so. In this case can you please clarify why when I place a SellLimit order manually I see the 'orderAction=Sell'?
Why when I click 'Sell Mkt' button I see the 'orderAction=Sell'?
Please take a look:

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