High card flush is a casino game where whoever has the highest flush will win. It is quite a new game and has only been available in Las Vegas since 2011. If you have played stud poker before it will be easy to learn but if not it's a simple game to pickup.
You start high card flush by putting in your compulsory Ante. At this point you can also decide to also put in a bonus bet. This bet is won when victorious over the dealer and the amount won is based on the strength of your hand and the casino game rules.
Everyone, including the dealer is dealt 7 face down cards. You examine your hand and then decide whether to fold or call. In high card flush the name is self explanatory and the rules make it a very simple casino game.
A 6 card flush beats any 5 card flush but loses to any 7 card flush. Same applies for all hands in high card flush
If both players have for example, a 5 card flush, Standard poker rules apply and the higher flush takes down the pot.
If you don't like your hands chances you should fold and forfeit your ante. If you want to proceed the amount wagered depends on your hand.