I dont think there is a standard on how much you may trade a day a week or even in a month, but in risk managements, for account 10,000 you may risk up to 2% in each trade, of course for starters to lessen the pain of a losing trade, but i may go up to 10-15% depending on what tpe of trading i do. 3 years of trading with hotforex and i still try to keep a good risk management to avoid blowing an account.