A demo validates the logic, not the execution. Real differences in slippage, spreads and liquidity, and the objective checklist for the jump to a real account.
"Try it on demo first" is the most repeated advice in trading. It is correct... and incomplete. Because the demo account has an uncomfortable secret: it is an optimistic simulator. Everything works a little better than reality: prices fill without slippage, spreads behave, and liquidity is infinite.
Understanding exactly what a demo validates (and what it doesn't) is what separates a professional transition to a real account from an avoidable disappointment.
What the Demo DOES Validate
In algorithmic trading, the demo account is a functional validation tool:
- Logic and configuration: the algorithm opens and closes trades according to its rules, the configured lot size is correct, the symbols match (including broker suffixes: XAUUSD.sc, EURUSD.r).
- Infrastructure: the connection to the copy trading API is stable, the VPS doesn't disconnect, the master's trades reach the account.
- General statistical behavior: over a horizon of weeks, the shape of the curve (trade frequency, duration, distribution of results) should resemble the system's track record.
What the Demo CANNOT Validate
1. Real Execution: Slippage and Rejections
On demo, your orders don't go to the market: they fill against the on-screen price. On real, every order competes for liquidity and suffers slippage according to latency and volatility. In short-target strategies, that 0.2-1 pip difference per trade is the distance between the backtest and your statement.
2. Spreads and Stress Conditions
Demo servers usually show idealized average spreads. On real, during high-impact news (NFP, CPI), spreads widen and market depth evaporates, exactly when it matters most.
3. Your Own Psychology
With fictitious money, an 8% floating drawdown is a statistical curiosity. With your real capital, it is a sleepless night and the temptation to disconnect the system at the worst possible moment — the pattern we analyze in Trading Psychology. The demo doesn't vaccinate against this; it only postpones it.
The Objective Checklist for Going Live
There is no magic date, but there are verifiable criteria. Go live when you can tick every box:
1. 4-8 weeks of forward testing on demo without technical errors: zero unmanaged disconnections, zero orphaned trades.
2. Metrics consistent with the system's history: if the audited track record shows a 60% win rate and your demo shows something comparable, the replication works.
3. Correct capitalization: your capital withstands the portfolio's historical drawdown with room to spare, per the minimums we calculate in minimum capital for algorithmic trading.
4. A conservative lot size defined by math, not by eagerness: projected combined risk in the conservative zone.
5. Drawdown tolerance decided in advance: you know exactly how much drawdown is statistically normal for your portfolio and beyond which threshold (which almost never arrives) you would disconnect.
The Smart Transition: Small Real
Between the demo and your target capital there is an underrated intermediate step: a real account at minimum lot size (0.01 per instrument). You pay a "tuition" of cents to validate real execution —slippage included— while your psychology acclimates to seeing real money fluctuate. When 4-8 weeks of metrics on small real confirm the demo, you scale the lot size to your final plan.
> [!TIP]
> Simulate first, connect after
> The professional order is: simulate → demo → small real → scale. The first step is solved by the Portfolio Builder: enter your capital, choose strategies and verify the projected combined drawdown. Then connect your account (demo or real) at any of our compatible brokers and let the data, not impatience, decide when to scale.
