Professional investors running mutual funds and hedge funds don't just look at a stock's fundamentals, they also track unusual volume.

Often, when heavy volume hits a stock, it precedes a notable jump in share price. The smart money likes to get in well before a big trend develops, so it's always prudent to scan the market for unusual volume activity across all sectors.

With that in mind, let's take a look at six stocks that are showing up on unusual volume scans.

General Electric Company

  • Wednesday's Volume: 41.46 million
  • Three-Month Average Volume: 34.25 million
  • Volume % Change: 55%

From a technical perspective, General Electric Co. (GE - Get Report) jumped modestly higher and flirted with its 50-day at $28.52 with above-average volume. This trend higher is starting to push this stock within range of triggering a breakout trade above a key downtrend line.

Traders should look for long-biased trades in GE as long as it's trending above its 20-day at $27.65 and then once it breaks out above resistance levels at $29 to $29.23 and over its 200-day at $29.38 with volume that hits near or above 34.25 million shares. Some possible upside targets off that breakout are $30.25 to $31, or even its 52-week high of $33 a share.

L3 Technologies Inc.

  • Wednesday's Volume: 1.13 million
  • Three-Month Average Volume: 553,009
  • Volume % Change: 107%

From a technical perspective, L3 Technologies Inc. (LLL) spiked higher right off its 50-day at $166.24 with strong upside volume flows. This high-volume bump to the upside is quickly pushing this stock within range of triggering a near-term breakout trade.

Traders should look for long-biased trades in LLL as long as it's trending above its 50-day at $166.24 or above its 20-day at $165.55 and then once it takes out Wednesday's intraday high of $169.07 to some more key resistance at $170.35 with volume that hits near or above 553,009 shares. Some possible upside targets off that breakout are $175 to its 52-week high of $179.95 a share.

The Home Depot Inc.

  • Wednesday's Volume: 5.99 million
  • Three-Month Average Volume: 4.06 million
  • Volume % Change: 65%

From a technical perspective, Home Depot Inc. (HD - Get Report) jumped higher back above its 20-day at $154.47 and into breakout territory above some near-term resistance levels at $155.80 to $155.86 with heavy upside volume.

Traders should look for long-biased trades in HD as long as it's trending above Wednesday's intraday low of $153.96 or above its 50-day at $152.56 and then once it sustains a move or close above Wednesday's intraday high of $157.28 with volume that hits near or above 4.06 million shares. Some possible upside targets off that move are $160 to its 52-week high of $160.86, or even $165 to $170 a share.

Hertz Global Holdings Inc.

  • Wednesday's Volume: 13.46 million
  • Three-Month Average Volume: 5.41 million
  • Volume % Change: 183%

From a technical perspective, Hertz Global Holdings Inc. (HTZ - Get Report) ripped higher right off its 20-day at $9.68 with monster upside volume flows. This high-volume spike to the upside is quickly pushing this stock within range of triggering a major breakout trade.

Traders should look for long-biased trades in HTZ as long as it's trending above its 20-day at $9.68 and then once it breaks out above some key resistance levels at $10.55 to $11 with volume that hits near or above 5.41 million shares. Some possible upside targets off that breakout are $12 to its 50-day at $12.87, or even $14 a share.

General Mills Inc.

  • Wednesday's Volume: 6.70 million
  • Three-Month Average Volume: 3.60 million
  • Volume % Change: 89%

From a technical perspective, General Mills Inc. (GIS - Get Report) trended modestly higher right above some near-term support levels around $58 to $57.50 with decent upside volume flows. This high-volume move higher is starting to push this stock within range of triggering a near-term breakout trade above a key downtrend line.

Traders should look for long-biased trades in GIS as long as it's trending above its 20-day at $57.11 and then once it breaks out above a key downtrend line that will trigger over resistance level at $60.21 to its 200-day at $60.37 and over $60.83 with volume that hits near or above 3.60 million shares. Some possible upside targets off that breakout are $63.20 to $65, or even $68 to $69 a share.

TG Therapeutics Inc.

  • Wednesday's Volume: 3.26 million
  • Three-Month Average Volume: 1.81 million
  • Volume % Change: 105%

From a technical perspective, TG Therapeutics Inc. (TGTX - Get Report) ripped higher right off some near-term support at $10.50 and briefly back above its 50-day at $11.20 with strong upside volume flows. This high-volume spike higher is quickly pushing this stock within range of triggering a big breakout trade.

Traders should look for long-biased trades in TGTX as long as it's trending above some near-term support at $10.50 and then once it clears some key overhead resistance levels at its 20-day of $11.86 to $12.20 and above $13.15 with volume that hits near or above 1.81 million shares. If that breakout hits soon, then this stock will set up to re-test or possibly take out its 52-week high of $15.35 a share.

This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.

Action Alerts PLUS, which Cramer manages as a charitable trust, is long GE.