Common questions

Is paper trading actually useful, or is it too different from investing real money?

It's different in one important way — virtual losses don't hurt — and useful in most others. What paper trading shows you is your decision pattern: when you get in, what makes you sell, how long you stay patient. Those tendencies tend to carry over to real money, even when the emotions scale up. Treat it as practice for your judgment rather than a forecast of your returns, and it's one of the cheapest lessons available in investing.

What can a historical simulation teach me that watching today's market can't?

Compression. A year of market history — or several — plays out in minutes, so you can live through drops, rallies, and long boring stretches you'd otherwise wait a decade to experience once. And because the data is real S&P 500 history rather than a random simulation, the situations you face are ones investors actually faced, with all their messiness intact.

Why does the Time Machine ask me to journal before each trade?

Because the reason you trade is more revealing than the trade. Writing one line about why — before you know how it turns out — creates a record your hindsight can't edit. Over a few runs, the journal starts to show patterns: what convinces you, what spooks you, which kinds of reasons tend to precede your better decisions. That mirror is the actual product; the trading is how it gets built.

Why is my result compared to the S&P 500?

Because 'did I make money?' is the wrong question in a rising market — most positions do. The more honest question is whether your decisions added anything over simply buying and holding the index, which is the low-cost alternative available to every investor. Historically, most active decisions haven't cleared that bar. Finding out how yours compare — and why — is worth more than the score itself.

Can I lose real money in the Time Machine?

No. Every run starts with $10,000 of virtual cash, and nothing connects to a real brokerage account. The only real thing at stake is what you learn about how you decide — which, conveniently, is also the only thing you keep.

If I beat the market in a simulation, does that mean I can beat it for real?

One good run suggests less than it feels like it does — a single stretch of history has a lot of luck in it, in both directions. What repeated runs can show you is more durable: your tendencies under pressure, the quality of your reasoning, how you respond to being down. Those patterns are worth trusting. A single scoreboard result isn't.