Stop Loss little above 612.
Look at the comments for better explanation and other charts.
Its like with twin sisters with different names, Mary and Jane and you wander which of them are more beautiful and if you got married one of them often there is too late to know that Jane has this bad habit of snoring in the night and then you think that Mary would not have it, but you really don't know which of other bad habits Mary also have. You just simply don't know...
This was my learning curve to look at Bitcoin charts closely cause I made the original analysis on my trading platform and the broker was not Bitstamp but BTCe, so I rushed to post my idea of this 4H chart not paying the attention that this are a different charts, also I didn't know that there is this horrible inconsistency of this two. Taking my only knowledge and observation from FX charts where inconsistency are not a big deal between brokers.
This is fun cause I though that there is something wrong with my analysis that I did some mistake. So I wait two weeks and now there is a clear picture and as you can see, primary analysis didn't lie, because the price on BTCe in this two weeks time or less, didn't even touch the theoretical stop loss of 612 price.