IMHO 68%

Quote from Alexandre:
a one touch option will pay 100% of a specified notional if at any time during the day we hit 1405 on the cash.
the price of such an option maybe quoted 57% - 62% meaning that you can buy this option for 62% of the specified notional or you can sell for 57%.
Let's say you believe we will the gap and are willing to bet around $6,000 (these options are also called American bets).
You can go and pay $6,200 for this option. If we hit 1405, the option is extinguished and you earn $10,000 minus $6,200 so $3,800.
It also means that the probability we will hit 1405 on the cash is around 60%.
hope this helps
Quote from Alexandre:
a one touch option will pay 100% of a specified notional if at any time during the day we hit 1405 on the cash.
the price of such an option maybe quoted 57% - 62% meaning that you can buy this option for 62% of the specified notional or you can sell it for 57%.
Let's say you believe we will fill the gap and are willing to bet around $6,000 (these options are also called American bets).
You can go and pay $6,200 for this option. If we hit 1405, the option is extinguished and you earn $10,000 minus $6,200 so $3,800.
It also means that the probability we will hit 1405 on the cash is around 60%.
hope this helps