I've been playing around with my own version of the Ichimoku algorithm (inspired by medji's) and am finding that there is certainly no one-size-fits-all setting for it. Settings that have been tuned to work great over the full year turn out to be not so great when run over a more recent period such from 1st December.

In hindsight this is pretty obvious, but it highlights the fact you need to continually tweak your algorithm for current market conditions to get best results.

Anyway, I'm too late to enter but my current best for period 1st January to 21st December on MtGox with 0.55% fee is:

$1757649.52 (2630.01512 BTC)