RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:swing trade at $6.28Qunite, I am not sure what you are refering to regarding trading in a TFSA. Perhaps you mean moving funds in/out of a TFSA? That could have limits. I am quite sure you can trade as much as you want in a tsfa given you may make money or lose.
Trading is a Tax Free account is just that - tax free. So if you make 100% profit, it is tax free as is any withdrawals which would include any capital gains.