How the Paper Trading Simulator Works
Understanding how a paper trading simulator operates isn't just academic — it affects how you interpret your results and whether your simulated performance will translate to real trading.
Here's a detailed breakdown of WealthSignal's paper trading engine.
Live Market Data
WealthSignal uses real-time market data for all paper trading operations. When you enter a trade, the price shown is the actual current market price. When the market closes, your positions reflect actual closing prices.
What this means for you: Your paper trading results are anchored to reality. The prices you see are the prices available to actual market participants.
Order Execution Model
Paper trading can't perfectly replicate live execution, but WealthSignal uses a realistic model:
Market orders execute at the last traded price at the moment the order is processed. In live markets, large orders can move the price or experience slippage. In paper trading, execution is instant at the quoted price — a slight advantage over reality.
Limit orders are placed in a simulated order book and execute when the market price crosses the limit price. This closely mirrors real limit order behavior.
What's different from real trading:
- No slippage on large orders
- No partial fills (orders execute in full)
- No market impact (your orders don't move the price)
- Instant execution with no latency
For most retail-sized positions (under $100K), these differences are minor. For larger positions or thinly-traded stocks, paper trading will be more favorable than live trading.
Portfolio Tracking
Your paper portfolio tracks:
- Position value: Marked to market with live prices
- Unrealized P&L: Current value vs. entry cost
- Realized P&L: Booked profit/loss on closed positions
- Cash balance: Decremented on buys, incremented on sells
- Total portfolio value: Cash + sum of all position values
The dashboard updates in real time during market hours.
Performance Metrics
At the end of each trading day, WealthSignal calculates:
- Daily return vs. previous close
- Cumulative return from account creation
- Sharpe ratio (rolling 30-day and since inception)
- Maximum drawdown (largest peak-to-trough decline)
- Win rate across all closed positions
These metrics are calculated using the same methodologies used in institutional performance reporting.
The Psychological Gap
The most important limitation of paper trading is psychological, not mechanical. Watching virtual money decline feels different than watching real money decline. The emotional discipline required to hold a position through a 15% drawdown in paper trading is easier to maintain than in real trading.
This isn't a bug — it's a feature you should be aware of. Use paper trading to validate your strategy. Understand that executing that strategy with real money will require additional psychological discipline.
Start Paper Trading
Your $1,000,000 paper portfolio is ready when you are. Check the Signals page for current strategy recommendations, review the risk metrics guide to know what to track, and start building your investing track record.
This platform is for educational purposes only. Paper trading results do not guarantee real trading performance.