When opening a new position, the maximum allowable size at the time of entry is 5% of your total account balance in contracts valued at $1, inclusive of any unrealized P&L. For example, if your account value is $10,000, you can buy up to 500 contracts of a single outcome. This is calculated against your account's original value. This limit applies at the moment the position is opened.
In addition, you can hold up 10% of your total account balance in $1 contracts in a single event. For example, three positions in markets that belonging to the same event, such as a single sports game, will contribute to this limit, but three positions across different sports games would contribute to separate limits.
We impose this rule to encourage healthy risk-taking strategies in our traders.