I've noticed that suddenly support on stocks exchange went up from 0.5 BTC to almost 3 BTC. For me it's a good indication: bigger buywalls = higher chances for the price to rise...
That's exactly what it is. The coin has a good support, which even with a strongly falling market does not allow the SEM coin to fall much. The chart shows that the price is at the bottom, which means there will be growth.