President Trump's pledge to spend a trillion dollars to build and repair America's highways, bridges and tunnels and other construction projects, is predicted by many analysts on Wall Street to help stocks in the heavy construction industry. These include; Argan Inc. (AGX) , Dycom Industries (DY) , EMCOR Group (EME) , Comfort Systems (FIX) , Granite Construction (GVA) and Jacobs Engineering (JEC) .

While gains since the election had been strong, these stocks have declined from their post-election highs, primarily on negative reactions to earnings reports. I will show updated weekly charts and the value levels at which to buy on weakness, and the risky levels at which to sell on strength.

Argan provides engineering, construction and management services primarily to the power-generation and renewable-energy industries. The stock gained 40.9% from its post-election low to its post-election high, but this gain has been slashed to 16.9% since its Jan. 25 high of $76.70. This has the stock in correction territory 17% below the high.

Dycom Industries provides contracting services such as construction, maintenance, and installation services. The stock gained 40% from its post-election low to its post-election high, but this gain has slipped to 28.1% since its March 2 high of $98.47.

EMCOR provides general electrical and mechanical construction services. The stock gained 21.2% from its post-election low to its post-election high, but this gain has evaporated as the stock set a fresh post-election low of $60.48 on Tuesday.

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