How many full stop-outs fit inside a 5% daily limit

[Fairman]

How many full stop-outs fit inside a 5% daily limit

A simple table I wish I'd seen before my first challenge.

Assume a $100,000 account with a 5% daily loss limit, so $5,000. Assume every losing trade loses exactly the planned risk, plus $7 commission per lot round turn.

At 1% risk per trade, $1,000, you get four full losses and you're at $4,000 plus commission. The fifth loss breaches. So really four, not five.
At 0.5% risk, $500, about nine losses fit before you're close to the limit once commission is included.
At 0.25% risk, $250, roughly nineteen.

Commission matters more than it looks. With a 6 pip stop on EURUSD, 1% risk is about 16.6 lots. $7 per lot is around $116 per trade. Four losses at that size cost about $464 in commission alone, which is close to half of another loss.

Slippage pushes it further. If stops slip by half a pip on average, that's another $83 per trade at 16.6 lots.

So at 1% risk, the realistic number of losers before a breach is three or four. Three or four losing trades in a row is a normal day for most scalping systems.

This is why I think 1% per trade on a 5% daily limit is too much for anyone taking more than a couple of trades a day. At 0.5% the same losing day leaves room to stop and think.

[Fairman]

Some firms calculate the daily limit from the higher of balance or equity at the start of the day. If you finished yesterday with a floating profit, today's limit is measured from that higher equity, so the room is smaller than you think. On a day that starts with an open trade up $1,000, the limit might effectively be $4,000 of real loss. Read your firm's definition carefully, because it changes the table above. A day that starts with a floating loss can be the opposite, depending on the rule. The wording decides it, and two firms with the same 5% headline can work very differently.

[Fairman]

Another way to look at it: decide the number of losers you want to survive, then work backwards to the risk size. If you want to be able to lose six in a row without breaching, $5,000 divided by six, minus a buffer for costs, is about $750 a trade, so roughly 0.75%. If you want ten, it's about 0.45%. Starting from the number of losers is easier than starting from a risk percentage someone else uses. Six losses in a row is not rare. For a system that wins half the time, it happens a few times in a thousand trades.

[Amanhasnoname]

Running these numbers is what made me cut my own risk. I was at 1% on a 5% daily limit during my first evaluation and breached on a day where I only lost five trades, two of them partly because of slippage on a fast open. Like your table shows, commission and slippage quietly turn what looks like a comfortable buffer into three or four real losses.

I now work backwards the way you describe in your last post. I want to survive eight losers in a row with room to spare, so I sit around 0.5% and stop for the day once I'm down 3%, well before the firm's limit. Stopping at 3% has saved me more than the risk size itself, because my worst decisions happen after the third or fourth loss.

The balance or equity point is a good warning too. One firm I tried counted floating profit at the start of the day, and I didn't realise until I was much closer to the limit than I thought. I read the exact rule wording before every evaluation now.

[Fairman]

A personal stop above the firm's limit also helps. If I set my own daily stop at 3% instead of 5%, a breach needs a mistake on top of a bad day. The difference between hitting my own stop and hitting the firm's is the difference between a pause and losing the account. At 0.5% risk, a 3% stop is six losses, which is enough to tell me the day isn't working. Pick the personal stop as a number of losses, then turn it into money, rather than the other way round. That keeps it meaningful when your risk size changes.

[Fairman]

The same table applies to the overall drawdown, just with bigger numbers. A 10% max drawdown at 1% risk is roughly ten losses with costs, which is not a lot over a few weeks. Most systems have losing streaks of eight or more in a few hundred trades. Sizing for the overall limit should come first, and then the daily limit is checked as a second layer. If both limits fit comfortably, the daily one rarely comes into play. If only the daily one fits, the overall one will catch you on a bad week.

[Shadow Trader]

On an ECN-style account connected to a genuine order book, a limit order isn't just a price. It has a place in line. Orders at the same price fill in the order they arrived, so an order placed a second earlier gets filled first.

That has odd consequences for scalpers who use limit entries to save the spread. A buy limit at the best bid joins the back of the queue. If the bid holds with plenty of size ahead, price can trade at that level several times and the order never fills. Only when the queue ahead gets consumed does the order get its turn.

Often, the order fills only when price is about to continue lower. Orders that sit at the front of the queue get hit just as the level breaks, while the ones at the back miss the bounces. The result is a selection effect: the fills a limit order gets skew toward the trades that go wrong.

Cancelling and re-placing an order sends it to the back again, so nervous order management costs queue position.

Retail platforms rarely show queue position, and many retail feeds aren't real books anyway. A broker that simulates limit orders against its own price stream treats them differently, filling once price touches the level, without any queue.

Knowing which kind of account is in use explains why limit fills behave the way they do.

Does a limit order on the current account seem to fill at touch, or only after price trades through?