Published
We ran dollar-cost averaging in paper accounts for months — thousands of simulated buys across crypto. The headline result kept looking great: account "up double digits." Then we measured the honest number, and the story changed.
The trick your brain plays
When you keep buying as price falls, your average entry drops. A lower average feels like progress. But a lower average is not profit — it is a lower break-even. Those are two completely different things, and conflating them is the single most common mistake in retail trading.
Here is the honest test. Your realized P/L is what you would actually bank if you sold everything right now: current value − total invested. If that number is negative, you have lost money, no matter how good your average looks.
A concrete example
Say you buy $100 ten times as a coin falls from $100 to $80. You invested $1,000, your average is roughly $90, and the price is $80. Your average ($90) is "below" where you started buying — looks fine. But realized P/L? You own ~11.1 units worth $80 each = ~$889. You are down about $111 (−11%). The good-looking average hid a real loss.
In our own paper run the gap was stark: a naive DCA account that displayed roughly +15% had a true equity of only about +11% once open bags were marked to market — and it sat through a hidden −23% drawdown along the way that the "average price" never showed.
So is DCA bad?
No — but it is not magic. DCA into something you believe in long term, on a fixed schedule, with money you will not need, is a perfectly reasonable way to remove timing stress. The danger is the emotional version: "averaging down" on a position that is bleeding, telling yourself the falling average means you are winning. That is how small losses become account-ending ones.
Two honest guardrails we use: (1) decide in advance how many buys and stop there — no infinite averaging into a knife; (2) judge the position by realized P/L, not by the average price.
See it for yourself
Plug your own numbers into the DCA reality calculator — it shows both your average and the honest realized return side by side. And before you add to any leveraged position, check the liquidation price and position size first.