Dear chc449 c-Hing,
It's many thanks for your help! I can learn more from you! In using winQ, Function -> Option, when I input HSI, it show "HSIU0" is an invalid option symbol!". When I input "HSIO", it shows "恆指大權 1009". What is wrong on me? And how to show "恆指小權" ?
And there are "(V)Bid", "(V)Ask", "L.Trade(V)". Is that mean the following?
"(V)Bid" =buy option price (call/put)
"(V)Ask"=sell option price (call/put)
"L.Trade(V)" =?? which I cannot guess, for example, 278S, 430S, 2189S, .... which is different on both Call and Put side.
R.Chg =?? which I also cannot guess, it is always negative number from -1, -3, ...-182
Many Thanks!
Gundam78