Need help creating a simple MT4 EA based on indicators

I need an EA built base on my trading strategy. This is an indicator base strategy. We’ll be using the stochastic Oscillator. I’ll send you a short video that explains the strategy. I need you to add auto lot size compounding to the EA, so the EA needs to have switch Incase I want to use manual lot size. 

BUY SCENARIOS 

1. Stochastic main line has to cross the signal line upward from below line 30 on the 1H timeframe. 
2. There has to be a bullish Heikin Ashi candle on the 1H timeframe. 
3. Open 3 positions. Set stop loss to 30 pips and TP 1 to 20 pips, TP 2 to 40 pips, and TP 3 to 60 pips. Move SL to breakeven once price moves 20 pips in profit. 
4. Close all buy positions as soon as stochastic main line crosses the signal line to the opposite direction. The robot must first close all buy positions before opening sell positions. This is very important as i don't want hedging.
5. When the robot opens buy positions and the opposite signal came in, the bot should first close the buy positions before opening the sell positions. 

SELL SCENARIOS 

This should be the opposite of BUY SCENARIOS.  Stochastic main line has to cross the signal line downward from above line 70 on the 1H timeframe.

Please change the Stochastic Settings to the ones below before working on the EA. 

Level

#30 oversold 

#70 overbought 

Variable                                       Value 

%K period                                      14

%D period                                        3

slowing                                            3