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That's an exhilirating film, no? Youthful underdogs closing the gap on the wily vets. In case you don't follow, this particular chart tracks how the Boston Celtics have slowly descended from NBA prominence while the Oklahoma City are gaining steam as the season progresses. The vertical axis is set to Efficiency Diff. which is simply a team's offensive efficiency subtracted by their defensive efficiency. It's the quickest way to measure the quality of a particular team. So in mid-December, you'll notice that the Celtics were rolling at +10 points per 100 possessions, 9 points better than the Thunder. But just a few short months later, that gap is all but vanished. Thanks Google Motion.

Want another matchup? Just click on the teams you want to compare on the right panel. The variety of options on this chart gives you the power to discover in-season storylines and developments that you just can't find in those prehistoric tables found elsewhere on the InterWebs. Choose what you want to analyze and watch the trends rise to the surface as you progress through the season.

Say you want to see the Bobcats improvement on offense over the course of the season. Switch the vertical axis to Efficiency (Offensive), select CHA as your team of choice, and press play. That's a 6-point improvement on offense since December. If you touch the screen, you can actually feel the Bobcats warm up to Larry Brown's system.

Who is the most improved team in the NBA since Christmas? Tough to argue against the Bulls. Flip it back to Efficiency Diff., select the Bulls and press play. Now, this toy aims to please. In its eternal quest to capture all the numbers in the dataset, the chart's perspective might seem a little too distanced. You can blame the wild fluctuations in the beginning of the season. But you can fix this. Going back to the Chicago illustration, click and drag an area on the graph that you'd like to key in on and click Zoom In, like so:

Now you can really see the gradual improvement since mid-December. How quickly we forget that the Bulls were at one point in the season the second worst team in the League. These days, they're one of the stronger teams in the Eastern Conference.

The zoom in function comes in handy for all types of analysis. You can focus on any stretch along the season. Did your team make a big trade deadline deal? Zoom in on that chunk of the season. Do the data points overlap? Zoom in to see the separation.

Remember, these graphs can chart the data in up to five dimensions. Say you want to see how the Knicks have shot the ball as their team pace evolved along the season. Switch the vertical axis to eFG%, change the color gradient from Unique Colors to Pace, and select NYK in the right panel. As you can see, the Knicks played at a furious pace to start the year but their shooting didn't improve until they slowed down a bit. The Knicks improved their shooting from 48.2 percent to 50.3 in just a few weeks while halting their tempo down two possessions per game. Correlation does not indicate causation and all that, of course. Nonetheless, this trend, and any others you find, certainly deserves more research.

Delve into the four factors some more. Boston's TO rate? Boom. Orlando's increasing opponent offensive rebound rate? Done. Memphis' opponent shooting percentage? . And that's just a handful of trends just waiting to uncovered.

Once you find something you like, grab a screenshot of it. On my keyboard, I press PrtSc button, paste the image in a photo editor, and crop the image down to just the graph. Save it to your desktop or your favorite folder for hot NBA graphics. Post it on your blog. Make it to your wallpaper. Whatever you want.