The last digit
Synthetic index prices are quoted to a fixed number of decimals. The last digit is the final decimal shown, from 0 to 9. A digit contract runs for a set number of ticks (1 to 10) and is settled on the last digit of the price at its final tick.
Even/Odd
Even wins if the last digit is 0, 2, 4, 6 or 8; Odd wins on 1, 3, 5, 7 or 9. With ten equally likely digits, each side has a 50% chance.
Over/Under
You choose a barrier digit. Over wins if the last digit is higher than the barrier; Under wins if it is lower. A last digit equal to the barrier loses both.
| Contract | Winning digits | Chance on a random digit |
|---|---|---|
| Under 7 | 0–6 | 70% |
| Over 2 | 3–9 | 70% |
| Under 5 | 0–4 | 50% |
| Over 4 | 5–9 | 50% |
| Over 7 | 8–9 | 20% |
The higher the chance of winning, the smaller the payout Deriv offers, and the reverse. That trade-off is the whole design of digit contracts: no barrier is "better" once payout is taken into account.
Matches/Differs
Matches wins only if the last digit equals the digit you picked: a 10% chance, with a large payout. Differs wins on any of the other nine digits: a 90% chance, with a small payout. Matches has the biggest swings of any digit contract; see the Digit Matches bot page for how a bot handles that.
Ticks and markets
Standard volatility indices tick about every two seconds; the "(1s)" versions tick every second, so short contracts finish faster. The volatility number changes how far the price moves, not how the last digit is chosen. More in volatility indices explained.
Using tools with digit contracts
The DigitTools Pro digit tools show the recent last-digit distribution and even/odd split for each market, and the free bot library has Over/Under, Even/Odd and Matches bots you can open and edit.
Frequently asked questions
What is the last digit in Deriv digit trading?
It is the final decimal of the price on the contract's last tick, a number from 0 to 9. Every digit contract is settled on it.
What happens if the last digit equals my Over/Under barrier?
The contract loses. Over needs a digit higher than the barrier and Under needs one lower.
Which digit contract has the best odds?
Differs wins 90% of the time and Under 7 or Over 2 win 70%, but their payouts are smaller in proportion. Higher odds always come with lower payouts.
How long does a digit contract last?
Between 1 and 10 ticks, which you choose when you buy it.