Winning rate of November 4nd week (1221transaction) is 54.82953317 %.
last week - number of transaction : 10194, win rate : 55.11%  
this week - number of transaction : 11415, win rate : 55.08%
( 6287.382 -  5617.9134 ) / (11415 - 10194) = 669.4686 /1221= 0.5482953317.
** 6287.382 = 11415 * 0.5508
** 5617.9134 = 10194* 0.5511

this winning rate is even included a test bets by very little amount (by administrator or beginner).
we think that if we get winning rate only bets more than 0.01 btc, the winning rate is more high.