Hello,
I specialize in developing indicators and Expert Advisors for MT4 (and MT5) and various other automated trading platforms including NinjaTrader, cTrader etc. I have completed 150+ trading projects here with excellent ratings, please check my reviews.
I read your requirements, and I can design the Expert Advisor as specified. Please note, it cannot be an indicator because trades cannot be opened from indicators.
I will scan all pairs (as configured in Marketwatch) based on the user configured time-frame. It will then alert when the condition is met and proceed based on user action (e.g. open chart, place trade etc).
I have a question - What happens if user is away from the terminal and the EA displays the message box (waiting for the user to click Ok, Yes, No etc) ? It that case the terminal may get slowed down or jammed if the user does not click the button immediately.
Looking forward to work with you,
Regards,
Adi.