Miners put the price (in dollars) in the blocks, and the medium price is taken as the price. You get penalized if the price you put in is 1 standard dev. or mo

Miners put the price (in dollars) in the blocks, and the medium price is taken as the price. You get penalized if the price you put in is 1 standard dev. or more off. You get 1% less of the block award you would get normally.