A trader shows me a screen with six open positions and says the book is diversified. Long EUR/USD, long GBP/USD, long AUD/USD, short USD/CHF, short USD/JPY, long gold. That is not six trades. That is one short dollar position with six different fee structures.

Currency pairs share a leg

Every FX pair contains two exposures. If the same currency appears on the same side of several positions, those positions move together by construction. The correlation is not a statistical curiosity that might fade; it is arithmetic.

Four positions, one bet. A hawkish surprise from the Federal Reserve hits all four within the same second, and the account takes four times the loss it budgeted for one.

Three layers of correlation worth tracking

The third layer is the one traders miss most often, because the positions look unrelated on the currency matrix. If every trade came from the same breakout trigger at the London open, they will fail together on the day that trigger stops working.

A simple exposure sheet

You do not need software. A column per currency and a row per open position is enough. Add the risk in each cell with the correct sign and read the totals.

• 1List open positions and the currency risk they imply.
• 2Net the exposure per currency in account terms.
• 3Apply a cap: no more than 1.5 per cent of equity net-long or net-short any one currency.
• 4Recheck before every new entry, not at the end of the day.

What to do when the sheet says you are over

Reduce the weakest expression of the same idea rather than closing the strongest. If four positions all express short dollar, keep the one with the cleanest technical structure and the tightest invalidation, and cut the rest to fit under the cap. The bet survives; the concentration does not.

Diversification is not owning more instruments. It is owning exposures that can disappoint you on different days.

Written by Adrian Vestberg — former interbank FX dealer, now running a two-person discretionary desk.

The post Correlation Risk: When Six Trades Are Really One appeared first on Pro Forex Traders.

Ask a room of retail traders what an acceptable drawdown is and you will hear numbers between five and fifty per cent, usually delivered with confidence and no reasoning. Ask a risk manager and you will get a question back: drawdown relative to what, measured over what horizon, produced by which strategy?

Three drawdowns that mean different things

The whole discipline of drawdown management is telling these apart quickly enough to act. A journal that records rule adherence separately from outcome is the only reliable instrument for doing it.

What the numbers usually look like

For a discretionary intraday FX book risking half a per cent per idea, a peak-to-trough drawdown of six to ten per cent inside a year is unremarkable. For a slower swing approach with a lower win rate and a higher payoff ratio, twelve to eighteen per cent is within normal range. Neither number is a target; both are the price of the return distribution you chose.

Expected versus tolerable

Expected drawdown comes from your track record and your risk per trade. Tolerable drawdown comes from your balance sheet and your nervous system. Professionals size so the first is comfortably inside the second, and they write both numbers down before the year starts.

1. Estimate the worst losing run your win rate makes likely across a year.
2. Multiply by your risk per trade to get expected drawdown.
3. Write down the loss at which you would genuinely change behaviour — that is tolerable drawdown.
4. If expected is within a few points of tolerable, reduce risk per trade until it is not.

The recovery arithmetic nobody likes

Losses and gains are not symmetric. A twenty per cent drawdown requires a twenty-five per cent gain to get back. A fifty per cent drawdown requires a hundred. This is the entire argument for small position sizes stated in one line, and it is why professionals spend far more time on the downside than on entries.

You cannot compound a return you did not keep. Capital preservation is not conservatism, it is the mechanism.

When drawdown becomes information

Treat a drawdown as information when three things happen together: the losses are clustered in one setup, the market structure you rely on has visibly changed, and your rule adherence score is high. High adherence plus poor results is the clearest evidence you have that the edge, not the trader, is the problem.

Written by Adrian Vestberg — former interbank FX dealer, now running a two-person discretionary desk.

The post How Much Drawdown Should a Professional Actually Tolerate? appeared first on Pro Forex Traders.

Most retail sizing advice is written for a winning week. It tells you to risk one or two per cent per trade and stops there. The rule only earns its keep during the stretch nobody plans for: eight losses in a row, a strategy that has stopped paying, a month where nothing you do works. A sizing rule that survives that month is built differently.

Size from the loss, never from the entry

The professional habit is to decide the money first and the lot size last. You know what a trade may cost you before you know how many units you will buy. That sounds obvious, but the common retail sequence is the reverse: pick a lot size that feels normal, place a stop where the chart suggests, and discover the risk afterwards.

Work in this order. Decide the account risk in currency. Measure the distance from entry to the invalidation level in pips. Divide. The result is your size, whatever it happens to be. If the answer is an awkward 0.37 lots, round down, never up.

Fix the fraction, then leave it alone

Fixed fractional risk — a constant percentage of current equity — has one property that matters more than its elegance: it shrinks automatically when you are losing and grows automatically when you are winning. You do not have to make a decision in the middle of a drawdown, which is exactly when your decisions are worst.

The usual professional range is between 0.25 and 1 per cent per idea. Higher than that and a normal losing streak becomes an account-threatening event. The table below shows why the difference is not cosmetic.

Eight consecutive losses is not a disaster scenario. On a strategy that wins 45 per cent of the time, a run of eight will show up roughly once every three hundred trades. If you trade five times a week, you should expect to meet it about once a year.

Cap the portfolio, not only the trade

A per-trade cap is necessary and insufficient. Four open positions at one per cent each are not four one per cent risks if they are all effectively short dollar. Professionals run a second cap on total open risk — typically two to three per cent across everything — and a third on correlated risk within a single theme.

• Per trade: 0.5 to 1 per cent of equity.
• Total open risk: no more than 3 per cent at any moment.
• Single theme (one currency, one central bank, one commodity bloc): no more than 1.5 per cent.

Write the de-risking ladder before you need it

The rule that actually saves accounts is the one that reduces size automatically after a defined loss. Decide the ladder while you are calm and put it where you can see it.

• -4%Cut per-trade risk in half. Keep trading, keep journalling.
• -7%Halve again and restrict yourself to your two highest-conviction setups.
• -10%Stop for the rest of the month. Review, do not trade.

Notice that the ladder never asks you to increase size to recover. Recovery sizing is how a bad month becomes a bad year.

A sizing rule you can follow at 60 per cent conviction and a 6 per cent drawdown is worth more than an optimal rule you abandon.

When to scale back up

Symmetry matters. Give the recovery the same structure as the reduction: return to full size only after the account makes back half the drawdown, and only after ten trades at reduced size that you executed as written. Time alone is not evidence.

Written by Adrian Vestberg — former interbank FX dealer, now running a two-person discretionary desk. He does not sell signals, courses or managed accounts.

The post Position Sizing Rules That Survive a Losing Month appeared first on Pro Forex Traders.