When trading volume on a particular market is especially heavy, PredictIt posts a notice at the top of the market page advising you to expect longer than normal processing times. Upon submitting an offer, you will receive notification that your request has been received. Offers are processed in the order in which they are received. Do not submit offers that are already in process. An offer you submit when a certain price is showing may not be matched at that price because of all of the offers in process ahead of yours.
Offers that are in process are marked with an asterisk in the offers tab. They can be cancelled before processing in the same manner as other open offers. You will receive a further notification once your offer has been processed.