so i have an ea that i want to be able to change the time frame from one to another

if there is no trade open it will move the tf to 1m and right after it opens a trade it will move it to 1h

before news it will move to 4h and after the news

all the peremeters below can be modified from inputs:

small tf to start exmple 1m

big tf to trade on exmple 1h

tf for news exmple 4h