I suggest you visit Investopedia. It is a tremendous resource.
Here is a short reply, though.
Bid is what someone is actively willing to pay, also known as buys. Ask is what someone is presently willing to sell, also known as sells.
If the current price amount is not one of those two numbers, it means that either the bid or ask MOVED after the most recent transaction - or at least that it is different. Usually, the ask would be, say .002 and the bid .0018. If someone really wanted to sell badly they could set their price at .0014 and it would sell at that price and the bid and ask would still stay the same.
Usually, the bid and ask change when all the shares at a particular price are sold/bought and each moves accordingly.
Grateful72,do you have a better understanding of trading yet??if you have more questions please don't hesitate 2 ask!! I think it is very important that you have an understanding of how trading works!!
Here 2 help if You have any more questions...IMO,gltu