So I picked this up on a holding today.
I thought it might mean something so googled it and got the below:
Highly spiritual Angle Number 777 is the Sign of getting Divine Guidance . That indicates Its time to get rewards for your efforts. … Angel Number 777 indicating the path of following your guardian angels 2. Repeatedly Seeing the Angel Number 777 means you’re Going to right way to achieving you Success.
So good sign?
only if it’s green and it’s the 7th time that position has acquired the number after you collected profits and reinvested the full funds during the dips 
If it hits 6.66% that’s when you need to worry
The saying goes that the brackets and the red colour enhance its divine power.
If your stock has gone up 777% then yes its a great sign!
I always trade with my gut, this method usually works well for me so if you feel it in your bones go for it! Being comfortable in your trades is the most important part, then you won’t sell on an impulse.