Convert Call/Put alert in MT4 into an indicator

Currently i have indicator that will pop out / send alerts to my mobile phone

but i would to make this indicator to become self automate to take buy / sell order on my MT4

for examples :

There is an alert to BUY EURUSD on Timeframe H4

EA will automatically convert the alert into BUY order with specific lot (can be adjusted inside the settings of the EA)

and the BUY position is running

However, whenever there is an opposite alert pop out (SELL EURUSD), the EA will automatically close the current running order

and switch it to SELL position