You ever notice how the best investment patterns just repeat? I was digging through some old market history and stumbled on something wild about Taser—the stun gun company that became a legend on Wall Street.

Back in 2002-2003, Taser went absolutely insane. From October 2002 to December 2004, the stock rocketed from $0.40 to $33.45. That's an 8,262% gain. Absolutely mind-bending. What made it happen? The company nailed product innovation with their X26 model—lighter, more compact, perfect for law enforcement. Then 9/11 happened, the DoD started funding them, and suddenly every police department in the country wanted their tech. By end of 2003, over 4,000 law enforcement agencies had adopted Taser guns. Perfect storm of timing, product fit, and zero real competition.

The legendary investor William O'Neil studied this move obsessively. He noticed Taser didn't just spike once—it broke out of two consecutive high-tight flag patterns. For those unfamiliar, O'Neil's high-tight flag works like this: stock moves 100%+ in 4-8 weeks, then consolidates with minimal pullback (under 25%), then breaks higher again. Sounds simple, but it's incredibly rare. O'Neil made a fortune recognizing these patterns in Qualcomm and Taser back in the day.

Now here's where it gets interesting. I'm watching Sandisk right now, and the chart is giving me serious 2003 Taser vibes. In January, Sandisk broke out of a textbook high-tight flag and ran 154% in just four weeks. Since then, it's been consolidating around 25%—and another flag pattern might be forming.

Why does this matter? Sandisk makes NAND flash memory for data centers and AI infrastructure. The fundamentals are explosive. Zacks is projecting triple-digit earnings growth through 2027. Demand for NAND is crushing supply right now because of the AI infrastructure buildout. That means premium margins.

The parallel is uncanny. You've got a company with breakout growth, a rare technical pattern that historically precedes massive runs, and a unique catalyst driving demand. Taser investors who recognized the pattern early made life-changing money. Sandisk might be setting up the same way.

Obviously nothing's guaranteed, but when you see strength like this backed by real earnings growth and supply constraints, it's worth paying attention. The market tends to repeat its best lessons for those watching closely enough.