An expert advisor based on Stochastic indicator and moving aeverage

creat an EA based on stochastic and moving aeverage base

when to buy :

1)price must be above 20 EMA 
2) stochastic crossover up side 
note : only buy trade will opened in this conditions even if there is a sell signal in stochastic ,it will only follow buy signal when price is above 20 ema

when to sell :
1)price must be below 20 EMA 
2) stochastic crossover down side 
note : only sell trade will opened in this conditions.even if there is a buy signal in stochastic ,it will only follow sell signal when price is below  20 ema

requirements :

1)maximum order open buy,maximum open order sell
2) stop loss 
3)take profit
4) trailing stop,start point ,trailing step ,trailing value
5) method high/low ,close/close for stochastic
6) simple/exponetial/smooth/linear weighted for moving aeverage. period can be changed

7)as soon as price move above certain points trailling start from break even points 

8)EA only start in other computor after i put certain code 

more requirements you add according to your very good knowledge 
this is my first EA making so help me make it great by your knowledge