Before revision:  We show that strategies in which the trader is observing the signal a number of times during the trading period, can dramatically reduce the transaction costs and improve the performance of the optimal static strategy . These results answer a question which was raised by Brigo and Piat 6 , by analyzing two cases where adaptive strategies can improve the performance of the execution .
After revision:  We show that strategies in which the trader is observing the signal a number of times during the trading period, can dramatically reduce the transaction costs and improve the performance of the optimal static strategy 6 , by analyzing two cases where adaptive strategies can improve the performance of the execution .