Paper trading platforms split into two families now. The first simulates you: a manual account with virtual money where you practice entries, exits, and order types. The second simulates your system: an environment where an automated strategy runs on live prices with virtual funds, so you audit the automation rather than your reflexes. Pick the family first, then the platform.
The platforms, side by side
| Platform | Best for | Assets | Automation | Cost |
|---|---|---|---|---|
| NickAI paper exchange | Testing an automated strategy end to end before it goes live | The venues Nick supports: stocks, crypto, perps, prediction markets | Yes, the same agent later runs your real account | Free trial, 1000 credits, no card |
| thinkorswim paperMoney (Schwab) | Manual practice on a professional desktop platform | US stocks, options, futures | No | Free with a Schwab account |
| Webull paper trading | Mobile-first manual practice | US stocks and options | No | Free with a Webull account |
| TradingView paper trading | Chart-driven manual entries with alerts | Anything TradingView charts | Alerts only | Free tier available |
| Investopedia Stock Simulator | Learning the basics with a leaderboard | US stocks | No | Free |
NickAI paper exchange: rehearse the system, not the clicks
This is the only option on the list built for automation. You describe a strategy in plain English, Nick builds the workflow, and you deploy it on the paper exchange with virtual money. It runs on live prices with the same data nodes, logic, and LLM consensus checks the live version will use. When the trade log stops surprising you, you switch the destination to your real exchange or brokerage account. Nothing about the strategy changes in between, which is the point: the thing you tested is the thing you run. Read the full method in our AI paper trading guide.
thinkorswim paperMoney: the professional desktop
Schwab's paperMoney gives you the complete thinkorswim platform with virtual funds. If you intend to trade options or futures by hand on a full-featured desktop, practicing on the real interface has obvious value. It simulates you, not a bot: there is no way to run an automated strategy against it.
Webull paper trading: practice in the app you already have
Webull's paper mode lives inside its mobile app and mirrors the live experience for US stocks and options. Zero setup if you already use Webull. Same limit as paperMoney: manual only.
TradingView paper trading: paper fills on the charts
TradingView lets you place paper orders directly from a chart, which suits traders whose process is chart-first. Alerts can nudge you, but execution stays manual, and strategy scripts test against history rather than running live paper fills for you.
Investopedia Stock Simulator: learn the vocabulary
A browser game with virtual cash and leaderboards. Good for understanding order types and how a portfolio moves. Not designed for testing anything you would actually run.
How to choose
- You trade by hand and want to practice a specific platform: use that platform's own paper mode (thinkorswim, Webull).
- Your process is chart-first: TradingView.
- You are brand new and want to learn the words: Investopedia.
- You want to run a strategy automatically and need to know how it behaves before real money: NickAI's paper exchange, because the paper run and the live run are the same agent.
One caveat that applies to every simulator
Paper fills are kinder than real fills. No simulator moves the market, so slippage on large orders and thin books is understated. Use any paper run as the necessary step, not the sufficient one: graduate with small size and scale as live behavior matches the paper log. Backtesting compresses the loop further; see paper trading vs backtesting for how the two fit together. And if you are still choosing which automation to test, start with the best AI trading bots in 2026.
Try it for free now: getnick.ai