@Avi There are two types of prices - SELL (BID) & BUY (ASK).
When you have a BUY position, you have to look at the SELL price, because that’s what you can sell your shares for. However, when you have a SELL position, then the BUY price becomes relevant because you need to purchase back the share.
There is always a difference between the BUY & SELL price called the spread.
You can check this post to learn how short selling works & why you have to look at the BUY price, not chart price (which is SELL).
Thanks David. I am noob, so still learning the art . Follow up question - why do the spread (difference between sell and buy price) keeps varying. the sell price changes at a faster rate than the buy price. this does not help in leveraging the volatility of the market at times.
@Avi The spread is just the difference between BUY & SELL. These two prices can move independently (although only slightly) from time to time. Both prices depend on liquidity & supply/demand. Usually, the more trading volume there is, the tighter the spread.