General information, not financial, investment, legal, tax or betting advice · Prediction markets carry risk of loss · 18+ or the legal age in your region
The Index 100/Learn/Responsible play and staying in control
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Responsible play and staying in control

A plain spoken pillar guide to responsible play in prediction markets and event contracts: setting money and time limits, the traps that pull you off plan, the tools that help, the warning signs, and where to get free support. Information, not advice.

Last reviewed 23 June 2026 · Educational, not advice

The one idea that matters

A price is a probability.

A contract that settles to one dollar if an event happens trades between 1 and 99 cents. That price is the market's estimate of the chance. Drag the slider to see the implied probability and what a 100 dollar stake would return if it resolves yes. It is an estimate, not a forecast, and not advice.

Price
50ยข
Implied chance
50%
Stake $100 if YES returns $200 · if NO you lose your stake.

Illustrative; excludes fees and spread, which reduce real returns.

FAQ

Common questions.

What does responsible play actually mean?

It means keeping the activity inside limits you set in advance, so a normal run of losses never touches money or time that matters. The core habits are risking only money you can afford to lose, setting a budget and a time allowance, never chasing a loss, and never using borrowed money.

How do I set a sensible budget?

Choose a total you could lose entirely without it changing anything that matters, treat it as the cost of participation rather than a balance you expect to grow, and size individual positions so a losing streak does not exhaust it in one sitting. If imagining the money already gone is uncomfortable, the number is too high.

What are the warning signs to watch for?

Spending more money or time than you planned, chasing losses, borrowing or moving money you needed in order to keep trading, hiding the activity, feeling restless when you cannot take part, and finding that open positions intrude on work, sleep, or relationships. Any of these is a reason to pause and reassess.

What tools can help me stay in control?

Many platforms offer deposit limits, loss limits, session reminders and time outs, and self exclusion. The time to switch them on is before you need them, when nothing is at stake, because that is far easier than reaching for them mid session.

Where can I get help if it stops feeling like a choice?

In the United States you can call or text 1 800 GAMBLER or visit ncpgambling.org for free, confidential support. Many regions have their own helplines. If the activity is affecting your wellbeing or finances, stepping back and seeking support is a reasonable and healthy choice.