Add small things to my EA (mt5)

Hi guys, so i have already made an EA which uses some indicator for signals but there is some small things that the EA misses: 

These things has to be add to my EA:

- break even function (If the value is set to 0 the function wouldn't work and if the value for example is set to 200, the stop loss would be at the break even like a normal break even function)

- Trailing stop function (If the value is set to 0 the function wouldn't work) 

- at the monent there is an order limit that means that only one trade at a time can be traded. Can you do a box in the settings that i can turn this function on and off.

- a new function if the MA crosses again it should close the the last order and open up a new one like if it gives a buy function for the first order it will buy and than if it gives few days later a sell signal it would sell the old one and open a new one