If you bailed because of Bollinger Bands, ran away from relative strength or took direction from the directional market indicator in 2021, you paid for it.

It’s testament to the straight-up trajectory of stocks that virtually all signals that told investors to do anything but buy have done them a disservice this year. In fact, when applied to the S&P 500, 15 of 22 chart-based indicators tracked by Bloomberg have actually lost money, back-testing data show. And all are doing worse than a simple buy-and-hold strategy, which is up 11%.

Of course, few investors employ technical studies in isolation, and even when they do, they rarely rely on a single charting technique to inform decisions. But if anything, the exercise is a reminder of the futility of calling a market top in a year when the journey has basically been a one-way trip.

“What we’ve seen this year is a very strong up market that didn’t get many pullbacks,” said Larry Williams, 78, creator of the Williams %R indicator that’s designed to capture a shift in a security’s momentum. A long-short strategy based on the technique is down 7.8% since the end of December.

“All the overbought and oversold indicators, mine as well as anybody else’s, didn’t get many buy signals, but a lot of sells,” he said.

The temptation to book profits and bail is getting hard to resist after the S&P 500’s best 12-month rally since the 1930s. Increasing the anxiety are a mountain of charts signaling a market that’s stretched to its limits.

Earlier this month, the index soared 16% above its 200-day average, a feat that before December had occurred only a handful times over the past three decades. Moreover, the benchmark’s relative strength index has surpassed 70 on both a weekly and monthly basis, a sign that the market has risen too far, too fast.

Add in pundits warning of bubble-like valuations and resurgent coronavirus concerns, and it’s a recipe for sell orders. Hedge funds, for instance, have hit the exits this month, stampeding out of tech stocks just days before Apple Inc. and Amazon.com Inc. report financial results.

Yet avoiding the stock market for any period of time has proven to be the riskiest wager of all. The S&P 500 has yet to retrench more than 5% this year. At the same time, missing out on the big up days is more penalizing than ever. Absent the top five sessions, the index’s 11% gain dwindles to 2%.

“To try to guess that this is the right time to be out of the market, you may as well go to Las Vegas,” said Mark Stoeckle, chief executive officer at Adams Funds. “There’s just as much risk doing that.”

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