Most bitcoin/fiat trade is done in terms of dollars. Even investors overseas (whose national currency is something other then dollars) will often trade in terms of dollars. When you convert euros or yen or british pounds to dollars you can get the equivalent of the respective currency and the amount of 411 US$ will be the support level.
Wow! Americans can be even more myopic than I thought!
* You can look at any credible data of world bitcoin trading (bitcoin <-> fiat), and there's more done in just Europe and Asia combined than there is in the U.S. And,
* Why would any European or Asian entity change their local currency to dollars to buy bitcoin in a local exchange? Regional exchange mechanisms accept regional currencies..
and the dollar, to be sure. And Americans often send dollars to foreign exchanges to buy bitcoin with dollars. But the locals have no reason to convert their local currencies to dollars to use those same exchanges. It just doesn't happen. And finally,
* How has that "$411 support level" been working for us? The market actually accelerated downward as it broke through that level, and reversed clear down at about 380. That
pseudo-support level provided no support at all -- and that's my whole point.
The sooner we stop extrapolating bitcoin price trajectories based solely on charts of the U.S. currency, the sooner we'll have meaningful tools of technical analysis in this new arena.