wow, thanks a lot, just wondering I havent moved passed a level 36 in either Team Slayer OR Team Doubles and I have had consistant winning streaks in Team Doubles and more spasmodic results in Team Slayer. So the more spasmodic results would cause a low sigma correct? And my fluidity in rank in doubles would cause a high sigma? If so then how come I have not ranked up in either, if I have a low in one and a high in another then surely one of them must work in my favour. You can't have 2 unfavourable instances or the ranking system wouldn't work. So can you help me with this? Please reply as I am somewhat stuck.... thanks