mandres02 wrote: My idea is two reach 690 or so. Do I have a chance to get into this range of grade with one month of preparation and using the 30 days left on the 60 days program or should I postpone the test and find a different alternative and not take the risk to take the test until I am in this level?

It sounds like you need a 50-90 point increase in one month. This kind of increase is definitely possible, but you'll need to work hard.

If you've already scheduled your test, you can still change the date (for a $50 fee) as long as you make the change more than 7 days before your scheduled test. Once you're within 7 days of your scheduled test date, it will cost you another $250 to reschedule.

Given this, here's my advice:

Don't worry about whether you have enough time to reach your target score. Just keep working at identifying and strengthening any weaknesses you may have. Then, when you're 8 or 9 days away from your scheduled test day, take an official GMATPrep practice test. At that time, if your score isn't close to your target score, you might want to consider rescheduling.

Cheers,
Brent