Risk per trade vs fixed lot: which to use

When setting up a signal copier, almost everyone looks at the lot size. But the number that decides whether a losing streak is a nuisance or a problem is not the lot: it is how much you lose if the trade hits its Stop Loss. And that number depends on how you size the trade.

There are two ways, and picking the wrong one is the quietest cause of accounts that bleed out.

What each mode means

• Fixed lot: the copier always opens the same lot, the one you set, whatever the signal.
• Risk per trade (percentage): the copier sizes the lot so that, if the trade hits the Stop Loss, you lose exactly that percentage of your balance. The lot changes with every signal; what stays fixed is what you risk.

They sound alike. They are not.

The same lot, two very different risks

Take a fixed lot of 0.10 on a USD account:

• EURUSD with a 20-pip Stop Loss. At 0.10 lots, each pip is worth about USD 1. If the stop is hit, you lose about USD 20.
• Gold (XAUUSD) with a Stop Loss USD 10 from the price. At most brokers, 1 lot of gold is 100 ounces, so 0.10 lots is 10 ounces. If the stop is hit, you lose about USD 100.

Same lot, five times the risk. If the channel you copy mixes currencies and gold —and many do— a fixed lot makes your risk per trade jump around without you changing anything. The same happens within a single pair when the channel alternates scalps with 15-pip stops and swing trades with 80-pip stops.

How risk-per-trade sizing computes the lot

The sum, in words: lot = (balance × percentage) ÷ (distance to the Stop Loss × value of that distance per lot).

With a USD 2,000 account and 1% risk, each trade risks USD 20:

• EURUSD with a 20-pip stop → 0.10 lots.
• Gold with a USD 10 stop → 0.02 lots.

Both trades lose the same if they hit the stop. That is what risk per trade buys you: your maximum loss per trade no longer depends on the asset or on how wide the channel sets the stop.

For the sum to come out right, the copier needs the real pip value of that instrument in your account currency. If it uses a generic table, the percentage lies; we cover it in depth in why a copier opens the wrong lot size. KoreSignal uses the data your own broker provides in your MetaTrader. And on a market order it sizes with the price you actually get, not the entry the channel wrote: if the price has already moved, the stop is further away and the lot has to be smaller.

Three limits no maths can get around

1 · The broker's minimum lot

Almost every broker has a minimum lot, usually 0.01. On a small account with a wide stop, the correct lot can fall below that minimum, and then there is no way to honour your percentage.

An example. A USD 500 account, 1% risk (USD 5), a gold signal with a USD 21 stop. The correct lot would be 0.0024: impossible. The minimum, 0.01, risks USD 21, which is 4.2% of the account. In KoreSignal the trade opens at the minimum (risking more than your 1%, because the alternative is not trading it), unless that minimum would risk more than 5% of the account. With the same signal on a USD 300 account, the minimum would risk 7%: then the signal is skipped, and the notice explains why and the two ways out: switch the channel to a fixed lot (and decide the risk yourself) or raise its percentage.

If your account is small, this is the most important point in the article: with small accounts and wide stops, risk per trade almost always ends up at the minimum lot, so it protects you less than it seems.

2 · No Stop Loss, no percentage

Risk is measured down to the stop. If the signal has no Stop Loss, there is no distance to compute anything with. That is why the channel should have a backup stop for signals that arrive without one.

3 · A ceiling for tiny stops

It also fails the other way: a 1-2 pip stop with a high percentage computes a huge lot. KoreSignal caps it at 25 lots per trade and records it when the cap applies.

And if you use several targets with partial closes, remember that each slice must also reach the broker's minimum: we explain it in partial closes at TP1, TP2 and TP3.

When each one fits

A fixed lot fits when:

• Your account is small and the percentage would end up at the minimum anyway.
• The channel trades a single instrument with similar stops.
• You want full predictability: you know which lot each signal will open.
• You are testing a channel and want to compare trades of the same size.

Risk per trade fits when:

• The channel mixes instruments (currencies, gold, indices).
• The channel's stops vary a lot from one signal to the next.
• Your account grows or shrinks over time: the lot adjusts by itself. After a losing streak it opens smaller lots and slows the drawdown; after a winning one, it grows them.

Neither one protects you from a bad channel. That is why, whatever the mode, what caps a day's damage is a daily loss limit: when your closed trades for the day reach it, the bot stops opening new ones.

How to set it up in KoreSignal

Each channel has its own mode, under "How the size is calculated":

• Fixed lot: you choose the lot.
• Risk %: you choose the risk per trade, and the bot sizes the lot so that, if the Stop Loss is hit, you lose that percentage.

You can run a gold channel on risk per trade and a currency channel on a fixed lot. And before deciding with real money, put the channel in simulation: the sizing works the same, against your simulation account's balance.

In short

• The lot does not tell you what you risk; the stop does. The same 0.10 can be USD 20 or USD 100.
• Risk per trade evens out the maximum loss across different assets and stops, as long as it uses the real pip value.
• On small accounts with wide stops, risk per trade runs into the broker's minimum lot.
• A fixed lot for small accounts and uniform channels; risk per trade for mixed channels and accounts that change size. And a daily limit with either.

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