Hey all,
One thing that annoyed me about the available online historical simulators was
1) The lack of ability to select one's investment timespan
2) The lack of multiple centile outputs (ie. 5th, 20th percentile end result from all possible historical periods)
3) Prettiness.
I believe I've made a pretty simulator that also solves problems 1 and 2.
Check it out here and do let me know what you think!