POK 0.00% 20.0¢ potash minerals limited

[ATTACH] Just a quick question for a newbie. Can someone please...

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    Just a quick question for a newbie. Can someone please explain why there are two green candles which are filled, whereas the others are hollow? What does this indicate? I have also noticed grey candles too on a few different charts. There's a tiny one on this chart just at the start of July. This is just the Westpac mobile app BTW.

    Thanks!
    Last edited by ruslah: 30/07/15
 
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