The real cost of scalping, measured in pips

The real cost of scalping is not the spread on one trade; it is the number of times you pay it. Seven
dollars sounds small, but someone running 200 lots a month pays it 200 times, and that total is usually
larger than the strategy’s profit target. This is why a strategy with a good win rate on historical data
still loses money on a live account.

This article does one calculation: convert the whole cost of a high-frequency strategy into pips, then
put it next to the target margin. Once the two numbers sit side by side, “can scalping be profitable”
becomes an arithmetic question instead of an opinion.

Cost accumulates per trade, not per hour

There are two cost structures in trading. Spread and commission scale with the number of entries; swap
scales with the number of nights held. Scalping puts the entire load on the first group and barely touches
the second — so any comparison with swing trading using one table is wrong.

Take an illustrative figure. Suppose the round-turn cost of one lot is $7, spread and commission included.
A swing trader opening 5 trades a month pays $35. A scalper opening 200 trades a month pays $1,400. Same cost
per lot, same broker, two numbers forty times apart.

That last figure is the one to compare against the profit target. It is also why “which broker is cheapest”
has no single answer: the cheapest broker for someone running 200 lots a month is not the cheapest for someone
running 5, because the two carry different cost structures and optimise different line items.

Convert the cost into pips

The most useful calculation for scalping is not in dollars but in pips, because a scalping target is also
set in pips. With both in the same unit you can see immediately how much of the target the cost eats.

The conversion: divide the round-turn cost per lot by the pip value of one lot. On a pair quoted to four
decimals, one pip on a standard lot is about $10, so a $7 cost is roughly 0.7 pip. Pip value per instrument is
covered in lot, pip and pip value.

Now place it next to the target. A strategy aiming for 5 pips has to clear 0.7 pip of cost — cost takes 14%
of the margin. Aiming for 2 pips, cost takes 35%. Aiming for 1 pip, cost takes 70% — and at that level the win
rate needed just to break even is higher than very few strategies sustain.

The conclusion is compact: the smaller the target margin, the more the cost structure matters relative to
finding a better signal. Below some threshold, no signal rescues the arithmetic. The threshold is tighter on the
major pairs, where raw spreads are already very narrow because global turnover concentrates there — narrow
spreads make small targets feasible, but they also make every addition heavier in proportion.

Slippage: the item not in the fee schedule

Spread and commission can be measured before you enter, so they are easy to put in the calculation. The third
item cannot: the difference between the price you see and the price you get. For swing trading, half a pip of
slippage is immaterial against a target of several hundred. For scalping, half a pip can be a quarter of the
margin.

Slippage also has a property that makes it harder than a fixed cost: it is not symmetric. When liquidity is
thin or price is moving fast, the difference usually leans against you — and those are exactly the windows where
scalping signals appear most often.

Since it cannot be measured in advance, measure it afterwards. After a month of trading, compare requested
price with fill price across every trade in the statement, average the difference, and add it to the per-lot cost
in the calculation above. It is very common for that figure to turn a margin you thought was positive into a
negative one.

How much does a rebate change the arithmetic?

A rebate is paid per lot, so it is the only item in the calculation that scales in the same direction as trade
count. High-frequency traders benefit most from it — not because their rate is higher, but because they multiply
it by more lots.

Back to the example: 200 lots a month at $7 per lot is $1,400. If the rebate is $3 per lot, $600 comes back and
the net cost is $800. In pips, the cost drops from about 0.7 to about 0.4 — enough to move a 2-pip strategy from
cost taking 35% of the margin to 20%.

But there is a trap specific to scalping. The highest rebates on any table usually belong to a sign-up route
carrying spread markup. For a high-frequency trader that
addition is paid hundreds of times a month while the rebate scales with the same lots — the two sides often cancel,
or tip the wrong way. So the correct comparison is: measured actual spread, plus commission, plus average slippage,
minus the rebate, on the exact instrument and the exact sign-up route.

Three operating conditions

Cost answers whether the strategy can be profitable. These three answer a different question: whether it can run
at all. A condition you cannot meet is a reason to rule the strategy out, not a minor drawback.

First, broker policy. Not every broker allows unrestricted scalping, and some impose a minimum holding time or a
minimum stop distance. For a strategy holding for tens of seconds, a requirement like that makes the whole thing
unworkable. Second, connection latency. Irrelevant for swing trading; for scalping and high-frequency EAs it feeds
directly into the fill price, so it is part of the cost rather than a convenience. Third, the hours you trade.
Scalping needs liquidity, and liquidity is not spread evenly through the day — running the same strategy in a thin
window means wider spreads and more slippage, the two items above.

When to widen the target instead

A simple test: take the net cost per lot in pips and divide it by the per-trade profit target in pips. If that
ratio is above one third, your strategy depends more on cost than on signal — and the most effective fix is not a
better signal but a wider target.

This article is for information and cost analysis only and is not investment advice. The figures above are illustrative, not any broker’s published rates; fee levels and conditions are published by the brokers and can change at any time. Leveraged forex and CFD trading carries a high level of risk and can cost you your entire deposit.