Modify existing Android app and deploy on play store

I have developed android app using angel one api. main function of app is ready with graph and placing order

Now want following aditing
Investor saves their details locally and order is place for respective investor using his credentials

And sell price is decided variably
Show peofit and loss on app


Need two button.
Chaal and pack.
On clicking close square off all position
On clicking buy add one more trade

You also need to deploy the app on store. I have free trial of amazon web Services