It was a tough end to the second quarter for the Dow Jones industrial average.
The benchmark for U.S. stocks into negative territory for 2015 this week after fears of a disruption to the European economy from a so-called Grexit weighed on this group of multinational bellwethers.
But to analysts who study charts for a living, the more important milestone was the Dow's close Monday below it's 200-day moving average for the first time in 170 days.
The average price of a security over the last 200 days is considered a reliable confirmation of a long-term uptrend. When it's breached, there should be trouble ahead.
But one research firm—Bespoke Investment Group—ran the numbers and found this chart breakdown historically is actually a great "buy the dip" opportunity.
Here's why ... plus the Dow members that could bounce back the most.