how to change expert adviser

[cha]

hello plz help me

how to change expert adviser If he should buy, he sells and if he should sell he buy

thanks all

[cha]

plz help

[qjol]

https://www.mql5.com/en/forum/101076

[cha]

qjol:

https://www.mql5.com/en/forum/101076

bro i change it not working plz help me i upload the file can u change it plzzz