Czuch Chuckers: It depends from you your opponents and the dice.....Such distribution is normal.
I've dug out some results from me against Jellyfish (5-point matches). Here are the results (1=win for me , 0=lose for me):
1011000110111011100100111111111010111011101


01011000000011011001001110101101 101001 = 48/80 = 60%
As you may see i have series of 9 matches won and series of 7 mathes lost. That is normal.....

An easy way to stop the free fall is to stop playing for a while so the graph would stop look like a free fall....