Before You Trade · Lesson 4 of 7
The House Always Takes Its Cut
Even if your predictions were exactly 50/50, you would still lose money. Here is the arithmetic of the grind.
Every trade you place pays the house, win or lose. The costs look laughably small — which is exactly why they are lethal, because nobody respects an enemy measured in fractions of a pip.
The spread is the gap between the buy and sell price — your broker's margin. On a major pair it might be one pip. You pay it on entry, automatically: every trade starts slightly underwater.
Commission on "raw spread" accounts: a few pounds per lot, per side, instead of (or as well as) spread.
Swap — a daily financing charge on positions held overnight, which can quietly exceed your expected profit on a slow-moving trade.
Slippage — the difference between the price you clicked and the price you got, worst exactly when markets move fast, which is exactly when you most care.
Now the arithmetic nobody performs on themselves. Say your all-in cost averages 1.5 pips per trade and you trade twice a day with a 40-pip stop and 25-pip target. That is 3 pips a day — 60 pips a month — 720 pips a year paid to the machinery before your predictions earn a penny. A coin-flip trader with those costs does not break even: they bleed, mathematically, forever. Cost per trade × frequency is a tax on activity itself — which is why the most common beginner behaviour, trading constantly, is the most expensive behaviour available.
Worth knowing: many retail brokers internalise ("B-book") client trades — meaning the broker's dealing desk is the counterparty and client losses are broker revenue. Reputable regulated brokers manage this with strict rules, but the structural fact remains: the industry's business model is built on flow and activity, not on your success. The people urging you to trade more often are being paid per trade. Draw your own conclusion.
The defence is embarrassingly simple: trade less, and only when something real is offered. Our own machine enters at most twice a day, at two fixed morning windows, and spends most of its life refusing trades — not because caution is noble, but because the arithmetic of costs punishes everything else.