Risk management in trading: stop loss and position size
Risk management is the part of trading that decides long-term results, and it has nothing to do with forecasting. It defines how much you can lose on a single trade, how many positions you hold at once and when you stop for the day. Two instruments carry the weight: the stop loss and the position size.
Risk is measured in percent, not in money
The first rule is to express risk as a share of account equity, not as a fixed amount. Professional traders usually risk between 1 and 2 percent of equity per position. On an account of 5,000 EUR that is 50 to 100 EUR per trade, on an account of 20,000 EUR it is 200 to 400 EUR.
The percentage approach keeps risk constant as the account grows or shrinks. A fixed euro amount does not: the same 200 EUR is 2 percent of 10,000 EUR but 10 percent of 2,000 EUR.
Where the stop belongs
A stop loss is not an arbitrary distance below the entry. It belongs where your trading idea is wrong: below a level the market has repeatedly defended, below a previous swing low, or beyond the range of normal fluctuation of that instrument and timeframe.
Two mistakes follow from ignoring that. A stop placed too close gets hit by ordinary noise while the idea is still intact. A stop placed far away for comfort increases the loss if the idea fails. The correct order is therefore always: first find the structural level, then calculate the position size from that distance.
Position size follows from the stop
The formula is simple and works across crypto, forex, stocks, indices and commodities:
Position size = risk amount ÷ (distance to stop × value per point)
An example: you risk 100 EUR, the stop sits 200 points away and one point is worth 0.50 EUR. The result is 100 ÷ (200 × 0.50) = 1 unit or contract. If the stop sits only 100 points away, the same risk allows twice the size. Volatility, not conviction, sets the volume.
Three brakes beyond the single trade
Even a well-sized position can be part of a bad series. Three additional limits help:
- Daily or weekly loss limit: a level at which trading stops for the day or the week. It prevents a single bad session from becoming a bad month.
- Maximum number of open positions: a hard cap on simultaneous exposure, including across asset classes.
- Correlation check: positions that move together are one risk, not several. Three long positions in correlated markets behave like one large position.
Where leverage fits in
Leverage is a tool for capital efficiency, not a risk setting. It changes how much margin a position requires but not the loss if the stop is hit, as long as position size is derived from the stop distance. Problems start when size is derived from available margin: then the stop distance collapses and the position becomes too large for the account.
A practical test before every trade: if the stop were hit, would the loss still be inside the planned percentage? If the answer is no, the position is too large, regardless of how attractive the setup looks.
Documenting risk
Risk management only becomes reliable when it is recorded. For every trade, note the planned risk in percent, the stop distance, the position size and the actual outcome measured in risk units rather than currency. Over a few dozen trades, this shows whether the rules are being followed and where the losses come from. On a platform such as Nexora Capital, where crypto, forex, stocks, indices and commodities sit in one account, the same risk unit can be applied across every market instead of being recalculated per platform.
Conclusion
Risk management answers a small set of questions before the trade, not during it: how much can I lose, where is the idea wrong, how large may the position be, and when do I stop for the day. A stop loss at the structural level, a position size derived from that distance and clear loss limits turn trading from a series of bets into a process with a known maximum cost.
Risk notice: Trading in crypto, forex, stocks, indices and commodities can lead to the loss of the capital invested. Leveraged products increase this risk. This article is for information only and does not constitute investment advice.