The predictability of the weekend effect is getting obnoxious.
Starting Saturday morning and ending Monday morning, here's the past month. I'll also include the "work week" in between so we can see how it compares.
Jan 28-30: Price increased slightly, with a spike upwards initially followed by a drop back to just above the starting point. About a $0.20 increase over the weekend.
Jan 30-Feb 4: Major rally, ending up about $0.70.
Feb 4-6: Definite downward trend, dropping ~$0.40 over the weekend
Feb 6-11: Slight increase over the week, ending up about $0.15.
Feb 11-13: A major drop of around $0.70 to $0.90 over the weekend (depending on how flexible you are with start/end times).
Feb 13-18: Continued major drop, ending down about $0.80 over the week.
Feb 18-20: Slight down then up, ending about $0.10 down for the weekend.
Feb 20-25: Rally week, up about $0.70.
Looking at all of the above, the most I'd really say is that weekends on average have a stagnating effect, and volumes are often lower. Because volumes are usually lower, if someone makes a big move on the weekend it can have a larger impact on prices. What you can really see, though, is that Bitcoin is simply very volatile -- no news there!