After very long time google update his backlinks. It's almost double then the previous number ( 24 to 50). my website is ( http://www.provaltech.com/ ) . At present my PR is 3 are there any chance of improvement. I am looking for the PR 4. Are it is possible to achieve PR 4 in next update. Looking for the expert comment.
There's really no way to predict something like that. It depends on what the next update is targeting. Hope everything works out.