Practice accounts show beautiful results during news events. The platform fills at the quoted price, spreads barely move, and orders go through instantly. Live trading brings a different experience.
Demo servers typically don't connect to real liquidity. They use a simulated feed and an execution engine that fills at the displayed price, regardless of how fast the market is moving. No slippage, no rejections, no widening spreads beyond what the feed shows.
A strategy that looks profitable on a demo around news can lose on a live account for exactly these reasons. The gap isn't small. A few pips of slippage on each trade can turn a winning expectancy into a losing one.
If a test on news events is the goal, live trading with minimal size is the honest way. Position size of a micro lot costs little and gives true fills, rejections, and spread behavior.
A record of "demo expected price versus live fill price" over twenty news events shows how large the illusion was.
The same principle applies to other fast situations: the opening of a session, thin markets, and flash moves.
The structure of live execution during news includes three costs that demos hide. The first is the widened spread. The second is slippage on the fill. The third is the missed trade, when the order never gets processed. A demo has none of them.
One more issue: the demo feed during news can be faster or smoother than the live one, since it doesn't pass through the same load. Price seems to move gently and predictably, giving a false sense of control.
Many scalpers who want to practice news setups use a small live account with a very small size. The cost is minimal, and the information gained is real. A set of ten live trades at 0.01 lots gives more insight than a hundred on demo.
A scoreboard comparing the demo and live versions of the same setup shows how much of the apparent edge disappears.
How different were the first live news trades compared with their demo equivalents?
News trading on demo is a different sport than live
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Shadow Trader
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