This week, 5 Software stocks are worse, according to the Portfolio Graderdatabase. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, Fortinet, Inc.’s (FTNT) rating worsens to a D from the company’s C rating a week ago. Fortinet, Inc. provides network security solutions. The company also gets F’s in operating margin growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of FTNT stock.

TubeMogul, Inc. (TUBE) earns a D this week, moving down from last week’s grade of C. The company also gets F’s in return on equity. For more information, get Portfolio Grader’s complete analysis of TUBE stock.

This is a rough week for Evolving Systems, Inc. (EVOL). The company’s rating falls to F from the previous week’s D. Evolving Systems, Inc. is a software company providing business and operational support services and solutions to the telecommunications industry. The company also gets F’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of EVOL stock.

Datawatch Corporation (DWCH) gets weaker ratings this week as last week’s C drops to a D. Datawatch Corporation provides business intelligence/enterprise reporting, data transformation, and support center solutions. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of DWCH stock.

MobileIron, Inc.’s (MOBL) rating weakens this week, dropping to a F versus last week’s D. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of MOBL 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.