The difference between being in a short vs long position is determined by whether the trader is 'buying' or 'selling' the asset and the direction price must trend in order for the trade to be successful.

In a long position, the trader is 'buying' and betting on the price moving up. In a short position the trader is 'selling' and betting on the price moving down. Both positions will increase in profitability as long as price continues to trend up for longs and down for shorts.

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