A sports exchange works differently from a traditional bookmaker. Instead of betting against the house, you're betting against other users, with the exchange just matching the two sides. That's where "back" and "lay" come from.
- Back means you're betting that something will happen — Mumbai Indians win, a team scores over 180, a player hits a fifty.
- Lay means you're betting against it happening — you're offering the other side of that exact bet to someone else.
Say Chennai Super Kings are trading at 2.00 to win. If you back them for ₹500 and they win, you get ₹1,000 back — your ₹500 stake plus ₹500 profit. If you lay them instead for the same ₹500 and they lose, you win that ₹500. But if they win, you owe the backer their profit, which is why laying carries a bigger downside if you haven't worked out your liability first.
