Risk Management for Prop Traders.

Most traders choose risk per trade the wrong way round. They look at the target, decide how fast they want to get there, and pick a size that gets them there quickly. Then the first losing streak arrives and the size that looked fine is suddenly far too big.

On a prop account you do it the other way. You start from the lines you cannot cross, work out how many losses you need to survive, and only then pick a size. The target comes last.

On OA Funded there are two lines. The daily loss floor is the higher of your start-of-day balance and equity, minus 5% of your initial balance. The maximum loss floor is static: your equity, including open trades, must stay above 90% of your initial balance, and it never moves. Both are checked against equity, so floating losses count.

In dollars: a $10K account has a daily allowance of $500 and a static floor of $9,000. A $25K account has a daily allowance of $1,250 and a static floor of $22,500. Everything in this unit is built on those four numbers.

Here is the part traders underestimate. If your setups win half the time, it feels like losses should alternate with wins. They do not. Over 100 independent trades with a 50% win rate, the chance of seeing at least one run of 5 losses in a row is about 81%. A run of 6 is about 55%. A run of 8 is about 17%.

With a 40% win rate, which is normal for many trend and breakout styles with bigger winners, the numbers get worse: about 87% for a run of 6 and about 49% for a run of 8 over 100 trades.

Put that next to the table above. At 1% risk on a fresh $10K account, a run of 5 losers in one day reaches the daily floor and a run of 10 reaches the static floor. Those streaks are not bad luck. They are expected over a few months of trading.

This is why I keep risk between a quarter and a half of a percent on prop accounts, and why I would ask you to start there. It is not caution for its own sake. It is sizing so that a streak you should expect cannot end the account.

Because the daily floor starts from the higher of balance and equity at the start of the day, carrying a trade across the day boundary changes your floor. The trading day follows the trading platform's server day, and the exact cut-off time is shown in your dashboard.

Carry a winner, and equity is higher than balance, so the floor is set from equity. If the trade then gives back its open profit, that giveback comes out of today's allowance. Carry a loser, and balance is higher, so the floor is set from balance, but your equity starts the day closer to it.

None of this means you cannot hold overnight. Overnight holding during the week is allowed. It means you should decide before the cut-off what you are carrying and what that does to tomorrow's floor.

OA Funded offers leverage up to 1:50, depending on the instrument. Leverage decides how big a position the platform lets you open for the margin you have. It does not decide how much you should risk. Your stop distance and your risk per trade decide that.

Here is why it matters. At 1:50, a $10K account could open roughly $500,000 of notional exposure if margin allowed it. A 0.2% move against that would be $1,000, which is the whole distance to the static floor. The platform letting you open a position is not the same as the account being able to survive it.

The OA Rules page also lists, under prohibited practices, all-in position sizing that puts a disproportionate share of your account equity at risk in one trade or series of trades. Sizing from the floors, as in this unit, keeps you far away from that line.

Your own limits should always trigger before OA's. If the first stop you ever hit is the firm's floor, you have no plan, only a boundary.

Set three kinds of stop. A daily dollar stop, such as 2 to 4 losing trades or about a third to a half of the daily allowance. A weekly dollar stop, such as 3% of the initial balance, after which you trade at half size until you are back above it. And behaviour stops: you stop for the day after you break one of your own rules, move a stop loss further away, or feel the urge to win a loss back.

That last one is the one that saves accounts. After two or three losers, most traders feel a pull to take the next setup bigger, or to take a setup that is not really there. That is the revenge urge, and it does not feel like revenge from the inside. It feels like confidence. Write the rule down: after my daily stop, I close the platform. Then get up and walk away from the screen. Come back tomorrow and recalculate your floors before your first trade.

On OA Funded you need at least 5 trading days in each phase, and at least 3 of them need a net realised profit of at least 0.5% of the initial balance. A day counts when you close a trade on that day. There is no time limit.

That rule pulls traders into two bad habits. The first is forcing: taking a weak setup on a quiet day because you want the day to count. The second is chasing the 0.5%: holding a small winner too long, or adding a second trade, to push a day over the line. Both put your normal risk rules second to a box you want ticked.

The fix is to stop thinking of the rule as a daily task. It is a minimum count over a phase with no deadline. If you trade your plan on the days your setups appear, the days will come. If your setups appear rarely, it will take longer, and that is allowed.

There is one situation that needs a plan. Sometimes you reach the profit target before you have 5 trading days or 3 qualifying days. Do not size up to make the remaining days big. Keep trading your normal setups at your normal risk, or lower, and accept that some of those days may lose. Every trade still has to stay open at least 2 minutes, and your floors still apply.