When do you attempt to sell and rebuy lower...

[Malin Keshar]

Sell when you have strong evidence of a reason that would cause the fall, or when you have strong evidence of manipulative pumping(for exemple: when litecoin has been added to huobi, biggest pump and dump in the crypto history).  For me wait for 60% fall is too much, if this happens, you might be in the burst of a speculative bubble like the tulip one and ends up losing everythin. I'm happy with 10% falls.
I guide myself more by news and psychological behavior than by analysis of graphs and economic indicatos, unless I want see if there is manipulative pumping. It's working so far, for almost 6 months only one great loss that took more than 1 week to recover

[Miz4r]

During the crashes of April and November I daytraded rapidly, multiplying my coins by 400-1000% within a week.

You must be the best day trader in the world to make 400-1000% profit in a week.

[TERA]

Nah it's not really hard with volatility like this:

[oda.krell]

The assumption here is that you missed the optimal selling point after a 25% decline, and the optimal buying back point after a 25% increase.

So your strategy is not to try to guess the top/bottom beforehand, but detect them after the fact?

I used the 25% constant as a very rough approximation. I called some of the tops/bottoms more accurately, and some I just slept through (I literally slept through them :/) But in principle, the answer is 'yes, mostly'. The strategy I tend to use I'd say is a hybrid between momentum trading and predictive trading. I'm sure, better and more experienced traders than me are more apt at pattern recognition, so they can see the major lines (and where they converge) ahead of time, but I most of the time trade after the fact, so my main emphasis is based on momentum. The question then is, "how long after the fact", and is it still consistently profitable.

[segeln]

I did`nt sell to rebuy lower but I bought more at the last volatility Chance April10.
I just read the TA by an expert (Godmode-trader.de) which stated March 3:

Kippt die Stimmung wieder mit Kursen signifikant unterhalb von 490 $ per Tagesschluss, sollte ein weiterer Test des Unterstützungsbereichs bei 360 - 400 $ eingeplant werden
http://www.godmode-trader.de/analyse/bitcoins-totgesagte-leben-laenger,3679751
Translation:

If the Sentiment is going down to BTC-Rates significant below 490 $ you should expect/plan a test of the Support in the 360-400 $ range.

It took 3 weeks for BTC-Rates going down and another week for support-test 340$.
Good buy for another 20 BTC.
Now we have the same Situation but with different $ range:

Fällt der Kurs jedoch auf Tages- und Wochenschlusskursbasis unter 335 $ ab, müssten Abgaben bis zum Unterstützungsbereich bei 250 - 270 $ einkalkuliert werden
http://www.godmode-trader.de/analyse/bitcoins-situation-spitzt-sich-zu-2,3730868
Translation:

If the rate is going under 335$ on day- or end of the week basis. you should calculate a drop to Support 250-270$

Support 250 -270$ is the April 2013 resistance which turned to Support by surpassimg this rate at about october 2013.

Edit:18:00 PM local time (04:00 PM Forum time): Links repaired

[RandomPedestrianN9]

Buy lower? There is no lower!

Stop spreading FUD you troll, oh you.

TO DA MOON!

[BitchicksHusband]

From what I can gather, TERA is a very good trader.  Unfortunately, he tends to give (honest, IMO) advice from that perspective which would be disastrous for most people to follow because they are not in the top percentage of traders like TERA.