Intraday EA upgrade

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I have been creating EA for a short time but olny have achived simple robots and they lack of the constraints I need to have.  Need an expert to support my amateur coding.

The EA should work on the following

• intraday basis
• from 5 minutes to 1 hour
• use moving averages and oscillators to execute trade
• MA triggered by crossing
• oscillators triggered by OB/OS or middle line (0)
• only one trade at a time 
• use money managment for lot sizing (editale in order to increse/decrease accodring to risk appetite)
• use trailing stop loss
• close order when signals invert or momentum loss (allowing to enter another in the opposite direction)
• takeprofit when certain signal is given (could prescind of this if trailing stop loss work optimaly)
• alert on the platform and via email when a trade is executed (open & close)
• should have trading hours restriction