I  was buying a coin on bittrex, looking at  the  order book  

ASK:  PRICE  0.00158400  

BID :  PRICE   0.00157780  

I  wanted  to buy it  so  I put  an order  at current market price (last  offer) but  it  has   not  been  fullfilled  yet ,  does this   mean that  people don't  want to sell (now),  so there is  more buying pressure?

 must  the  ask price  reach   0.00157780 to   get  my order fullfilled ?

Sorry noob....