Hey Kirby. Based on what I've seen, Grab candles are really nothing more than standard red or green candles with the exception of a 3rd color that appears during sideways consolidation, like maybe blue.
It's nothing that can't be seen with the naked eye anyway. I don't see any advantage in using them. If you decide to use them, they'll still require that you spend a lot of time analyzing price action and understand how candles work in general before it would really help.
I've noticed that a lot of folks use them with an EMA34 type of tunnel as well. The same thing applies there...even with the tunnel, price can still move the opposite of what the tunnel and the candles are telling you. But, as an add-on to an existing system where you have a solid checklist in place, it won't hurt anything. It's really all a matter of preference.
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