Macd type EA

I have an idea for a scalping bot partly using macd for entries and exits............ 

if macd is above signal, only buy

if macd is below signal line, only sell

open a buy trade when active candle closes above previous candle high and macd signal line is above macd line

open a sell if candle closes below previous candle low and signal line is below macd line

close buy or sell trades if the signal line crosses the macd

 have an option to use a trailing stop X pips behind the price line

if the last trade was closed at a loss, have an option to increase the lot size of the next trade by addition or multiple.

fixed lots or at a ratio of balance

magic number.

make robot able to take control of manual trades