Guys, is the promotion still valid for Maybank2u online share trading?

Another question, I have been involved in share market for about 5 months, but I'm going for long term investment.

What does it mean by contra T+3? From my understanding, does that means that lets say IF I buy in CIMB at 7.4, after 30 minutes if the counter rise to 9.4 (assume la ). I submit my sell queue and I'll earn the profits immediately?

Of course I understand have to take the brokerage fees into consideration, can someone guide me?

Thanks alot

I didn't fill in the employer's details when applying as I'm still a student, but they will limit your trading amount to 20K if not mistaken.