Just the rough length of the flag pole ($6050 - $5700 = $350). So $5550 - $350 = $5200. Very rough estimate. It didn't quite get there but around $5300 is a decent buy when it has already fallen so much.
I'm all in now on Luno. Been waiting for this day for months and made over 6 figures equivalent in BTC tonight. Will watch what happens if/when it gets back to the $5770 region on Bitstamp. Then will know better whether to keep holding or sell.
Hard to say what will happen tomorrow. After this new 2018 low, will people waiting on the sidelines with cash come in or will people who have been holding offline start panicking and thus load their BTC on exchanges to sell? Though at least the market is open up again now for traders with $6k broken properly. Now the price can move more freely instead of dying on $6k each time. The last two months has been like watching paint dry.