if you already buying highest price i think you have to cancel selling order marked price will be going up and if you want to sell on profit you can sell it if you want to more highest price you will hold it if you want ..... everything thing depend on mass popularity demand and supply ... every seller and buyer have smallest value can be effect on marked price .. you can feel it in marked prince depend on every body hand ... so try to use your power positively ... This is my opinion only . analysis according to the market condition demand and supply popularity.....