Rule 5.12.2(h): Whether the bid (or offer) is higher (or lower) than the previous bid (or offer) but is withdrawn or amended to avoid execution.
This could indicate that the order is not genuine, especially where a distinctive pattern of such orders is observed. At the time the bid (or offer) was made, the Trading Member or Trading Representative did not intend to buy (or sell), but intended that the bid (or offer) would not trade and would be withdrawn eventually. Sometimes, such orders are entered to induce buyers (or sellers) into the market to facilitate the filling of an order on the other side of the market.
Circumstances that should be carefully reviewed by Trading Members and Trading Representatives include where there is a particularly high ratio of order to trade volume or a record of actively entering and amending orders on both sides of the order book but only trading on one side.