MQL4 or MQL5 whats difference between EA's developed on each one?

Trading Systems Expert Advisors and Automated Trading
1

Hiya,

Shall I code an EA in MQL4 or MQL5? whats difference between EA’s developed on each one? Shall I spend sharpening my coding skills on MQL4 or MQL5? Why do you suggest that?

Thnx :heart_eyes: