Five tech services 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”).

Gartner, Inc. (IT) ups its rating to a B (“buy”) this week after earning a C (“hold”) in the week before. In Portfolio Grader’s specific subcategory of Equity, IT also gets an A. Gartner provides research and analysis on the computer hardware, software, communications, and related information technology industries. For more information, get Portfolio Grader’s complete analysis of IT stock.

This week, Planet Payment, Inc. (PLPM) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). Planet Payment provides international payment processing and multi-currency processing services. For more information, get Portfolio Grader’s complete analysis of PLPM stock.

The rating of Blackhawk Network Holdings Inc Class A (HAWK) moves up this week, rising from a B to an A. For more information, get Portfolio Grader’s complete analysis of HAWK stock.

This is a strong week for Western Union Company (WU). The company’s rating climbs to B from the previous week’s C. Western Union is engaged in global money transfer and payment services. For more information, get Portfolio Grader’s complete analysis of WU stock.

This week, Convergys Corporation’s (CVG) ratings are up from a C last week to a B. Convergys provides customer management business process outsourcing solutions for communications, financial services, technology, and other vertical markets in North America and internationally. For more information, get Portfolio Grader’s complete analysis of CVG 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.