Take profit (TP) is a final word in your deal, when the time comes to actually take your profit.
It’s a sell (for a long strategy) or buy order (for a short trade) when the certain price is reached.
These are the factors that affect the take profit price:
Take profit value - obviously the more you want the higher price should be reached; Exchange fee - make sure you don't follow the scenario where the fee is more than the profit you get; Extra orders - each time an extra order is executed bot recalculates the take profit price so that it would be easier to reach.