Paper trading: how to do it so it counts
Lesson 26 · about 8 min
Paper trading means trading a simulated account with fake money. Everyone recommends it; almost nobody does it well. Done badly, it teaches you that trading is easy. Done properly, it is the cheapest education you will ever get. The difference is entirely in how you treat it.
What paper trading is for
It is not for finding out whether you can make money. A month of simulated profits proves very little, because the sim removes the two things that break real traders: real slippage and real fear. Paper trading is for:
- Learning the platform. Which button is market, which is limit, where the time-in-force lives, how to attach a stop, what a partial fill looks like. Make every mistake here.
- Testing a process. Do you have a repeatable way to find, enter, manage and exit trades? Can you write it down and follow it 30 times in a row?
- Building the journaling habit before there is money to distract you from it.
- Measuring a strategy's rough shape. Win rate, average win versus average loss, how often you get stopped out, what drawdowns look like. Not precisely, but enough to know if you are in the neighbourhood of an edge.
How to make it realistic
The sim will lie to you in predictable ways. Correct for each one.
| Sim lie | Correction |
|---|---|
| Fills at the mid or at last price | Assume you pay the ask when buying and receive the bid when selling; record that price, not the sim's |
| Instant fills of any size | Only trade sizes that would fit in the displayed book; look at Level 1 size |
| Limit orders fill the moment price touches them | Require price to trade through your limit by at least a tick before counting it filled |
| No commissions or fees | Subtract your real broker's fees manually in the journal |
| A $100,000 balance | Set the sim to the real amount you will actually fund, or mentally scale everything |
| No consequences for holding a loser | Enforce your stop as if it were real: when it hits, you are out, no exceptions |
| Unlimited do-overs | No resets. When the account drops 20%, that is a failed month; write the post-mortem |
The single most important rule: treat every sim trade as if it were real, including the boring ones and the ones you would rather forget. If you catch yourself taking a "fun" trade you would never take with money, you have stopped learning and started playing.
What to trade in the sim
One style, one market, as chosen at the end of Module 7. Not five. A paper account is where discipline is built, and discipline is one thing at a time. If you chose swing trading liquid stocks, then for 90 days that is all the sim contains. No options because a friend mentioned them. No crypto because it is a weekend.
How long
Long enough to accumulate a sample. For swing trading, that is roughly 30 to 50 trades, which at a few trades a week is two to three months. For intraday styles, 100+ trades, which can happen in a few weeks but should still span at least a couple of months so you see different market conditions. A sim record from a single calm, rising month tells you nothing about how you will behave in a choppy, falling one.
What "done" looks like
You are ready to move to tiny real size when:
- You have a written process that you followed on at least 90% of trades (the journal proves this).
- You have 30-50+ trades logged with realistic fills and costs.
- Your results, after those adjustments, are at least break-even, or the losses are small and you can explain them.
- You have stopped making platform errors (wrong order type, wrong size, forgotten stops).
- You have gone through at least one losing streak of four or five trades and followed the plan anyway.
If the sim results are strongly positive, be a little suspicious rather than excited. Check the fills again. Check whether you cherry-picked. The sim rarely underestimates.
Key idea: Paper trading proves your process, not your profitability. Make the sim as punishing as reality (worse fills, real costs, enforced stops, no resets), trade one style in one market, and graduate only when the journal shows you followed the plan through a losing streak.
The sim-to-real gap
Expect your first weeks of real trading, even at tiny size, to be worse than your sim. That is normal. Money makes you hesitate on entries, exit winners early and hold losers long. The whole reason for tiny sizing (lesson 3 of this module) is to experience that gap where it costs almost nothing. Traders who jump from sim straight to meaningful size discover the gap with meaningful money.
Tools
Most brokers include a paper account; use the one on the platform you will actually trade, so the muscle memory transfers. Free charting platforms also offer paper trading. For futures, many brokers give free sim access to real-time data. If a sim charges a fee, that is fine for a month or two; if it charges a lot, the free broker version is enough.
Try it: Set up a paper account today, funded with the real amount you plan to trade. Write your process on one page: how you find a trade, what the entry looks like, where the stop goes, how you size, how you exit. Place one trade by that process, record the realistic fill and cost, and set a calendar reminder for 90 days from now to review the results.
Recap
- Paper trading is for learning the platform, testing a written process and building the journaling habit, not for proving profits.
- Correct for sim lies: assume you pay the spread, count only realistic fills, subtract real fees, enforce stops, no resets.
- Trade one style in one market for the whole period.
- Graduate after 30-50+ journaled trades, a followed process, and at least one losing streak handled correctly.
- Expect real trading to be worse than the sim at first; that is what tiny sizing is for.
See it drawn
Original diagrams for the ideas on this page. Illustrative, not real market data.