market price = difference bwt supply and demand
ever seen market depth?
watch market depth
and when u sell at market price the best buy price gets it
example
tejas network share
buyer be there at 100 shares @ 218
and second position 1000 shares buyer be at @ 217.95
and you sell 1100 @ mkt price then your all shares will get executed 100 at 218 and rest 1000 at 217.95
understand?
You said:
First A want to buy 100 share @ mkt price 218
second B want to buy 1000 share
@MKT price 217.95
C want to sell 1100 share
@MKT price
As fluctuating mkt price fulfill the need of A , transaction occur immediately
and as mkt price fulfill the need of B, transaction occur immediately
Hence seller earn total (218+217.95) . Have I understood right ?