Anyone know how to use ForkDelta?

Someone selling PAL at: 0.00003eth for 1PAL
forkdelta.github.io/#!/trade/PAL-ETH
When at idex and coinbene is: 0,00005eth / 1PAL

I never used ForkDelta, could someone help me? It is around 30% cheaper, I could give a tip if someone learn me how to forkdelta.

Thanks.