Buy a stake in the outcome you predict will happen. If your prediction comes true, you earn. The winners are paid a proportionate amount of what was staked by the losers.
Each prediction market is assigned a panel of Oracles that must agree on the outcome. For example: if a prediction market is created asking whether or not it will rain tomorrow in Paris, a weather source will be published with the prediction market and when the market closes the Oracles will use the published weather source to form a consensus of whether it rained or not in Paris.
Tangled does not receive any fee or commission on prediction markets and there is no door charge to participate.