Barcelona are currently in their best form. If they are back to the way they started the season, also, however you try and list everything in the table between Barcelona and Real Madrid, you forget to indicate the points.
However, there is not a difference in points currently; both teams are sharing the same points, which is 60 points, and with this result, Barcelona's first position is still shaking. They need to try harder to get as many points as they can to be able to secure the first position so that we can confidently say Barcelona will win the league title this season.
Since Real Madrid are able to share the points with the Barcelona there’s possibility that will soon take over the top of the standing from the Barcelona, because their in the best form not mean say they can able to maintain that first position, as you said earlier that their position is shaking is true as they can see that Real Madrid have close the points gap with them that’s what is causing the shaking of their position.
Furthermore, Barcelona has a lot of work to if they really want to keep staying in top tables, but given them a higher hope to win this La Liga league that’s what I never sure of it; because their best form you stated earlier is not up to that percent to have confidence on them.