Are there any lot size restrictions?
In Direct and Prime accounts, you are free to trade as many lots as you like. However in 1 Step Pro and 2 Step Pro accounts (Hola Prime accounts only), there are following maximum exposure limits on open trades:-
$5,000 account: None
$10,000 account: None
$25,000 account: Maximum 10 lots
$50,000 account: Maximum 20 lots
$100,000 account: Maximum 40 lots
$200,000 account: Maximum 80 lots
$300,000 account: Maximum 120 lots
In case of breach of above guideline, all open trades will be automatically closed by the system and the account will be disabled. Profits from trades that exceeded the specified limits will be deducted from the account. If these deductions lead to a breach of the Daily Loss Limit or Maximum Loss Limit, the trader will be responsible for the outcome.
Further, general risk management rules should always be kept in mind, and the trader should trade in the account as if it were their money. Read about prohibited Gambling behavior here.