Five software stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

Ellie Mae, Inc. (ELLI) is making headway this week, with the company’s rating improving to an A (“strong buy”) from a B (“buy”) last week. Ellie Mae provides business automation software for the mortgage industry in the United States. In Portfolio Grader’s specific subcategories of Earnings Momentum and Sales Growth, ELLI also gets A’s. For more information, get Portfolio Grader’s complete analysis of ELLI stock.

The rating of Envivio, Inc. (ENVI) moves up this week, rising from a B to an A. Envivio provides software-based IP video processing and distribution solutions to mobile and broadband service providers, cable multiple system operators, and direct broadcast satellite service providers and content providers. For more information, get Portfolio Grader’s complete analysis of ENVI stock.

Giant Interactive Group, Inc. Sponsored ADR (GA) gets a higher grade this week, advancing from a B last week to an A. Giant Interactive Group develops and operates online games in the People’s Republic of China. For more information, get Portfolio Grader’s complete analysis of GA stock.

This week, FactSet’s (FDS) ratings are up from a B last week to an A. FactSet Research Systems supplies global economic and financial data to analysts, investment bankers, and other financial professionals. For more information, get Portfolio Grader’s complete analysis of FDS stock.

This week, Advent Software, Inc. (ADVS) is showing significant improvement as the company’s rating hops from a C (“hold”) to a B (“buy”). Advent Software provides software products and services for automating and integrating data and work flows across the investment management organization, as well as between the investment management organization and external parties worldwide. Shares of the stock have been changing hands at an unusually rapid pace, up 490.8% from the week prior. For more information, get Portfolio Grader’s complete analysis of ADVS stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.