I have a working EA using MQL4 on an MT4 platform that may place a pending trade dependent on certain market criteria at the time, using vlines to initiate the market checks. I want an Android app to allow my friend and me to create, move or delete vlines when we are afk; the EA would action these requests and then process them using the existing code. It would also be helpful if the app could initiate the deletion of pending trades and closure of open trades, bearing in mind that there will be different order numbers depending on which MT4 is processing the request; it could be (should be) both. I have a small web service on my VPS that could be used to PUT and GET data files (in JSON?). Obviously, the EA will need to be amended to receive vline and/or order management data to whatever central service we use to handle requests. The EA should also transmit vlines we place manually so that the two MT4 platforms remain in sync. Lastly, in the nice to have category, we are currently using Telegram to provide an audio alert when an event happens; this could be moved to the Android app too.