This story, or a version of it, has been doing the rounds for many years. Unfortunately, there is not a shred of evidence that Hitler was in the slightest bit superstitious (unlike a few of the other Nazi leaders) and certainly none exists that he used Horoscopes in his decision making process.
The acticle does make passing mention of this:
I love it; "Historians now say...". They have always said so as far as I am aware.Historians now say that Hitler took no notice at all of astrological forecasts.