You'll be asked to specify the price at which you want to buy or sell and the number of shares you want to buy or sell:
Note that you can also set an expiration date & time if you want to automatically cancel your unmatched order before the event ends. Note that Predictious will use the timezone you set in your account settings.
You are then asked to review your prediction before sending it to the market to be matched. You should carefully review the price you've set and the number of shares you want to trade before confirming your prediction:
You can go back to the previous screen at any time. Once you're ready to send your prediction to the market - hit the blue Confirm button.
Note that you can sell shares without owning any, if you want to read more about this, visit this article.