Statistic bar in professional gameplay (help!)

[burgerunderwear]

Hello everyone. Can someone please explain the details of the bar on the left in this image below:

[Byrom]

thats points he needs to get to to make frame safe - baring snookers - player is on 52 needs to get to 68 - there is a possible 135 on

[burgerunderwear]

thats points he needs to get to to make frame safe - baring snookers - player is on 52 needs to get to 68 - there is a possible 135 on

Thank you so much! I just couldn't find this anywhere