Why Do I Increase My Position Size After a Loss?
Check whether your position size changes after losing trades, and by how much.
Check My Position SizingAfter a loss, many traders size up on the next trade. The thinking is natural: the market owes you one, a bigger position will win the money back faster, and the last trade was probably just bad luck. In the moment it feels like a plan. In the numbers it often looks like something else.
A larger size after a loss does two things at once. It makes the next loss bigger, and it makes you more likely to take that trade for emotional reasons rather than because the setup meets your rules. When it happens repeatedly, one bad run turns into a deep drawdown, and drawdowns are expensive to climb out of.
Not everyone does this, and some do the opposite and shrink their size after losses. The point is not that sizing up is always wrong, but that it should be a decision you made on purpose rather than a reflex you do not notice. You cannot tell which it is from memory.
Your trade history can. If your file includes entry price and quantity, the analyzer compares the typical size of the trade that follows a loss with the one that follows a win. To set size by risk instead, use the position size calculator.
Drop your trade history CSV here
Closed positions or P&L history from your exchange. Up to 5 MB.
Your file is read in memory and is never saved — only the result of the analysis is kept (7 days, or until you delete it if you save it to your account). Don't include passwords or API keys. See the Privacy Policy.
Example — not your data
Example result
Typical position after a win
5,000
Typical position after a loss
34% larger
6,700
Trades compared
42 after losses · 39 after wins
Illustrative numbers for a made-up account, shown so you know what a result looks like. They are not your data and not a benchmark.
What the comparison does
Size after a loss versus after a win
Compares the median position value of trades that follow a loss with those that follow a win, so a few huge trades cannot skew it.
A threshold and a sample
A pattern is reported only when size after losses is at least 15% larger and there are at least 8 trades on each side.
The wait before the trade
Alongside size, it checks whether you also re-enter faster after losses. See why you might overtrade.
Results afterwards
Looks at how trades turn out after a run of losses, where larger size does the most damage.
Frequently asked questions
Is increasing size after a loss always a mistake?
Not necessarily. If it follows a rule you set in advance, it is a strategy. The concern is the unplanned version, where the size grows because of how the last trade felt. The analysis shows how often your size changes after losses and leaves the judgement to you.
What if my file has no quantity or entry price?
Position size is calculated from entry price and quantity. Without them the analyzer cannot compare size, but it can still measure your results, re-entry timing and the other patterns.
How big a change counts as a pattern?
The analyzer reports it when your typical size after losses is at least 15% larger than after wins, using at least 8 trades on each side. Smaller differences are treated as noise rather than reported as findings.
Which file should I upload?
A CSV where each row is one finished trade with its result: your exchange's closed positions or profit-and-loss history. It needs a close time and a result, or entry price, exit price, quantity and side. A list of individual order fills is not enough, because fills cannot be paired into trades without guessing.
Is my trade history stored?
The file is read in memory and is not saved. Only the result of the analysis is kept: for 7 days if you do not sign in, or until you delete it if you save it to your account. The analyzer never asks for exchange passwords or API keys.
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Holdy Lab content is educational and is not financial advice. Results describe the data you provide; they do not predict future results.