I have no idea why. It is super irritating sometimes, but its the same story, same game. Steem seems to always lag while other alts are making gains and seems to go when other alts stop going. It never fails. Right now it has gone nowhere while LTC and EOS have rallied 50+%, but the chart looks promising.
It is time for Steem to play catch up. If Steem were to catch up to the other alts and their gains, you are looking at Steem to $0.75 easy! This is the place where most of all crypto finally broke down and LTC and EOS are already BACK to those levels. Steem should head that direction soon.