sentences:  The reason behind investigating such a measure is to assess the influence of bids (especially market orders) on the market clearing price (the price for each product calculated during the auction).Traders are often forced to enter bids as market orders (a bid specifying only the required quantity, not limited by a certain price) in order to have a certainty of being able to procure the necessary volumes to close their positions.Market orders can potentially have a major impact on the outcome of the auction since particularly significant bid/s can cause a dramatic shift in the aggregated demand, or in the aggregated supply curve leading to unwanted price spikes.