Cycle Log progress bar!

[Psyklon]

This may sound like a daft question and the answer is probably very apparent but can someone tell me.....what are the vertical lines that appear on the yellow progress bars? TIA.

 

[deptfordmarmoset]

The red line is the distance you should have done to match your target. Orange is where you were on the scale last year.

 

[Psyklon]

Thank you!