It's no contest. With a stock price that's almost 96% higher year-to-date on a total returns basis, shares of aerospace giant Boeing Co. (BA) are the clear winner in the battle to be the top performer in the Dow Jones Industrial Average.

The next-closest performer, Caterpillar Inc. (CAT) , is trailing by more than 30 percentage points - that's how standout Boeing's price performance has been so far this year.

But what most market-watchers may not realize is that fact that Boeing's price trajectory isn't showing any signs of slowing down as we head towards the winter months. In fact, Boeing is still very much a "buy the dips stock" this December.

To figure out how to trade it, we're turning to the chart for a technical look:

It hasn't been all that long since we last looked at Boeing's technical setup.

At the time, Boeing was just coming off of its trendline support level, the uptrending price line that's acted like a "floor" for shares going all the way back to the start of the year. Put simply, every test of that trendline support level in 2017 has given investors a low-risk, high-reward buying opportunity for shares. And so, as Boeing bounced off of support for a fifth time, the high-probability move was to buy that bounce higher.

Since then, not much has changed. Boeing has charged higher off of its trendline at the start of this month, clearing the way to new all-time highs as we close in on year-end. With nearly half the distance to trendline resistance still clear in Boeing's price chart, shares have ample room to continue their run before they hit any semblance of upside pressure.

Meanwhile, relative strength, the indicator down at the bottom of the Boeing chart that measures this stock's performance relative to the rest of the S&P 500, continues to look bullish. Boeing has been outperforming all year long, and it's continuing to make higher lows in its relative strength line. That's an indication that BA remains statistically predisposed to keep on outperforming the rest of the market on a three-to-six month time horizon.

For late-to-the-game investors thinking about picking up shares of Boeing here, the outlook remains bullish, although risk-management remains key. The 50-day moving average has started acting like a reasonably good proxy for support, which makes it a logical level to park a protective stop beneath right now.

On the other hand, investors who can stomach being a little more patient in Boeing should pick shares up on the rebound after the next dip in shares. Boeing is still unequivocally a "buy the dips stock" right now.

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

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