Modify custom indicator and EA

I have a custom indicator that I would like to modify. I want to switch the order rules from a buy to a sell and vice versa, so when the indicator would give a buy signal instead it will give a sell signal, and when the indicator would give a sell order instead it will give a buy signal. We will basically flip the signal arrows and also invert the SL & TP, so the TP would be the SL and the SL would be the TP. I also have a custom EA that is based on the same indicator that I want modified the same way. I want to switch the order rules from a buy to a sell and vice versa, so when the EA would open a buy order instead it will open a sell order, and when the EA would open a sell order instead it will open a buy order. We will basically flip the order and also invert the SL & TP, so the TP would be the SL and the SL would be the TP. That's all thanks.