Cube orange not maintaining altitude during mission

I’m using cube pilot for a large Quadcopter. It’s not maintaining altitude during auto mode. For auto mode speed set to 3m/s. Specially during high wind If I fly it against the wind direction then it will it will drop it’s altitude so much. To fix the altitude problem I try to use NRA 24 radar. Radar working properly. Still it’s not able maintain its altitude. Please help

It is not clear to me what you are asking.
I understood that your drone is not able to move against high wind on the same altidude level.
Without knowing any technikal details about your drone and without any log data of such a flight we only can guess.
My first idea is that the drone has not enough available power.
Available power can be limited by the electric system battery, ESC, motors or maybe by settings of the flight controller.

The problem is caused by velocity-dependent pressure changes in the barometer. Read section 1, 9 and 10 of How to methodically tune (almost) any multicopter using ArduCopter 4.4.x