The red line is supposed to indicate a possibly "bad" pushback, and the green one a good one. However, the good/bad detection is not perfect, since it only consider one class of possible issues that, even if mathematically "wrong", wouldn't cause problems in the actual pushback, while is still not able to catch *all* possible problems.
This means, you should rather use your judgement, and if a red path looks good, it work, while if a green path looks bad, it will work bad. The most tell-tale sign of a bad pushback, are dots under the airplane belly that are not well placed, that will surely create a 180 degrees turn over the nosewheel.
For example, in your case, the red path seems better than the green one (assuming there are no issues under the airplane). And yes, we'll try to improve the good/bad path detection system in the next updates.
