Technically speaking a take profit order is classed as a limit sell order. You can place this order by clicking on the asset you want to take profit on, click the sell tab, then click the limit selector. Set the price that you want to take profit at and then enter the amount of the asset to sell (either the qty of the asset or qty of what the asset is worth at the trigger price). Click the Sell button and check the order details.
NOTE: Limit orders are still executed as market orders with the liquidity providers when Swyftx determines that the sell will be filled as close as possible to the rate provided for the trigger.