the price begins to go up, you reach a profitable price faster so that you can get rid of the coin without a loss. to do this, some people create very loose or aggressive buy settings so that the bot will buy fast if the coin is dropping. others believe it is better to wait for the coin to drop and then stabilize before buying. there is not a lot of definitive data on which way works better, so experiment and research this topic before deciding on a strategy.
the sell is just like the buy, and like the buy, can happen in two places: the pairs side of the bot, 