Adding code to my expert advisor (Spread, opening position, time restriction)

Greetings friends,

Project: Adding code to my expert advisor

Specific:

1. Adding a Maximum Spread parameter, which will only open a new position when the spread on a currency is between 0 and the Maximum Spread. Is the spread over the Maximum spread, no trade will open.

2. Adding what type of order it can open, there are 3 choices. Open only buy position or sell position or buy and sell position. Currently the strategies in the .mq4 file can open both sell and buy position when the strategy is met. But what i want to add is a limit, example: one day i want the portifolio ea only to open buy position, it only opens buy position, if a strategy is met but if it's a sell it will ignore this. If another day i put the EA settings to only to open sell position, it will only open sell position, and no buy position will open before i change it either to: "Only open buy position" or "Buy and sell position"

3. Adding time restriction on a new open trade, example: after 50 seconds a trade is open, it closes, 

Thanks  :-)