Three Machinery 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”).

Middleby Corp. (NASDAQ:MIDD) is showing solid improvement this week. The company’s rating rises from a C (“hold”) to a B (“buy”). The Middleby is engaged in the design, manufacture, marketing, distribution, and service of a line of cooking and warming equipment. In Portfolio Grader’s specific subcategory of Equity, MIDD also gets an A. For more information, get Portfolio Grader’s complete analysis of MIDD stock.

Alamo Group (NYSE:ALG) is boosting its rating from a B (“buy”) to an A (“strong buy”) this week. Alamo Group is a designer, manufacturer, distributor, and service provider for high-quality equipment for right-of-way maintenance and agriculture. Shares of the stock have been trading at an exceptionally rapid pace, up threefold from the week prior. For more information, get Portfolio Grader’s complete analysis of ALG stock.

Flow International (NASDAQ:FLOW) earns a B this week, jumping up from last week’s grade of C. Flow International designs, develops, manufactures, markets, and services ultrahigh-pressure waterjet cutting and cleaning systems. The stock price has risen 24.6% over the past month, better than the 1.2% increase the Nasdaq has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of FLOW 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.