SVE · Execution
Paper trading
Also called: simulated trading, demo trading, practice trading
Paper trading means placing simulated orders against market prices without committing capital, to practice execution and test a process.
Definition
Paper trading is simulated trading: you place orders, see fills, track positions and profit and loss, but no capital is committed and no order reaches an exchange. The name comes from the practice of recording hypothetical trades on paper.
Modern paper trading runs on a simulator or matching engine that decides whether and at what price each simulated order would have filled.
Intuition
Execution is a skill separate from analysis. Knowing where you want to buy is not the same as entering the order correctly, sizing it, setting exits and managing the position when the market moves. Paper trading lets you practice that workflow, and test whether a process can be followed consistently, without financial consequences.
It also exposes practical problems early: orders entered at the wrong price, exits forgotten, position sizes that feel very different once they are on screen.
How it's calculated
The quality of a paper-trading result depends on the fill model. Key elements:
- Fill price: market orders should fill at the opposite side of the book (buy at the ask, sell at the bid), not at the last trade or mid.
- Slippage: large orders walk the book; a realistic model consumes displayed depth level by level.
- Queue position: a resting order at a price is not filled the moment price touches it; others may be ahead in the queue.
- Costs: fees, financing and spread should be deducted.
Simulated P&L for a position is Σ (exit price − entry price) × quantity × direction − costs, marked to the current price while open.
How to read it
Treat paper results as an upper bound on what the same decisions would have produced with capital at stake. Simplified fill models, the absence of market impact and the absence of emotional pressure all flatter the outcome.
Use paper trading to verify that orders, exits and position management work as intended, and to build a log of decisions you can review, rather than as evidence of profitability.
A useful habit is to compare each simulated fill with the book at the moment the order was placed. If simulated prices are consistently better than the best available opposite quote, the fill model is too generous.
Common mistakes
- Assuming fills at the touch or the mid price are realistic.
- Ignoring fees and slippage in the simulated P&L.
- Sizing positions far larger than you would with your own capital.
- Treating a short run of good paper results as proof that a strategy works.
In Saqrid
SVE provides paper trading on a built-in matching engine, so you can practice without a brokerage account.
The header and trade ticket state where orders go: paper, simulated, blocked or no broker.
Open SVE.