Vishay Intertechnology, Inc. (VSH) shares are taking a breather on Wednesday after a stunning run. The stock has gained about 400% in just three months. But when a stock moves that far, that fast, it often gets ahead of itself. And by some measures, Vishay is as stretched as it has ever been.

Many trading strategies rely on the idea that things tend to revert to the mean. If a stock gets pushed too far in one direction, there's a good chance it will snap back. Right now, Vishay looks like it's been stretched to its limit.

The chart below shows the Relative Strength Index (RSI), a popular momentum indicator. When the blue line rises above the horizontal red line, it signals overbought conditions. And for Vishay, that blue line is not just above the red line — it's at a level the stock has never seen before in its entire history as a public company, dating back to 1973.

That kind of extreme doesn't happen often. When it does, traders pay attention. Some are already anticipating a reversal or at least a move lower. The logic is simple: when aggressive buying pushes a stock beyond its normal range, sellers eventually step in to take profits, and the price can fall.

But here's the thing about tops: they're nearly impossible to call with precision. As the old Wall Street saying goes, "The only people that can get the top and bottom are liars." The best traders don't try to nail the exact peak. Instead, they wait for the downtrend to actually start before selling. They know they won't get the best price, but they also know that waiting for confirmation increases their odds of success.

So what does this mean for Vishay? The stock is the most overbought it has ever been. History suggests that when momentum reaches such extremes, a reversal is likely. Whether it happens tomorrow, next week, or next month is anyone's guess. But the odds are increasingly pointing lower.