It works very similarly to Intrade, just different currency/amounts.
If you put up 1 mBTC long, someone else must put up 9 mBTC short. Or 2 & 8, 2.5 & 7.5, etc.
For any matched bet, there is 10 mBTC between both sides combined. Whoever is correct takes the pot (minus a small fee).
It took me a while to get accustomed to the Intrade/Predictious method, but once you're used to it, you'll be comfortable not only buying shares, but also selling matched (long or short) shares when the odds improve.
Thanks notlogic
I means is the "odds"
let say the odds now is 4.50 for "long"
when I go in, can I put it become 1.00
because I will start from 1.00 odds to 10.00 if I win.
10.00 - 1.00 = 9.00 I win, rather than I continue use other "offer" 4.50
(10.00 - 4.50 = 5.50) I only win 5.50
or maybe I need to open new trade for starting this 1.00 odds?