EA Auto timeframe change

This is an update for my MT5/ MQL5 EA. I need the EA to be able to automatically change the exit signal to a higher timeframe when a signal is generated on that higher timeframe. For example, if a signal is generated on 5min timeframe and the robot enters a trade, If exit strategy or stop loss is not triggered on the 5 min timeframe; and the new signal is generated on the next highest timeframe (15 mins), the exit strategy will now be executed based on 15 mins automatically ( this timeframe becomes the current timeframe. If a new signal gets generated on 1hr if the trade is still running after some time, 1hr becomes the new current time frame (exit signal will now be generated based on the 1hr timeframe.