I have a confession. About once a year, I trade Coinbase.
I know better every single time. I trade it anyway. And every single time, it costs me.
Not because COIN is a bad company. Simply because it is one of the most uniquely dangerous stocks for someone with my trading style, my account size, and my risk tolerance. And I keep forgetting that — usually because someone else sees something in it and I get pulled along for the ride.
So I’m writing this post partly as a warning to you, and partly as a reminder to myself. Never again.
What makes a stock land on your Do-Not-Trade List
It’s not about whether a stock goes up or down. It’s about whether its behavior is compatible with your process.
Some stocks move in ways that fit your system: clean levels, manageable spreads, predictable reactions to key zones. Others are technically tradeable but practically dangerous for who you are as a trader. Those belong on your Do-Not-Trade list. Not because they’re uninvestable. Because they’re wrong for YOU.
Here’s how to know if a stock belongs on yours.
1. It’s too expensive for your account size to manage risk properly. When a stock’s options are priced so high that you can only afford out-of-the-money contracts to keep the dollar risk reasonable, that’s a problem. Way out-of-the-money options are a bad bet at the best of times. They require a massive move just to break even, and they expire worthless more often than not. If the only way you can afford to trade a stock is to take a bad position, that stock doesn’t belong in your account.
This is Coinbase for me. The options are expensive enough that getting proper positioning means risking more than my position-sizing rules allow. And if I try to manage the cost by going further out-of-the-money, I’ve already compromised the trade before it starts.
2. It moves in ways that are incompatible with your style. COIN drops $20+ in a single day when it wants to sell off. Straight down, one direction, all session. If you’re a dip buyer and exhaustion trader, that kind of momentum move will eat you alive. By the time it looks like a bottom, it’s already $20 lower than your entry. And I’d assume it can rip $20 to the upside just as fast, but sadly, I’ve never been in it on the right side to find out.
If you want to look at technical indicators that measure how volatile a ticker is before trading it, you can look at ATR (Average True Range) and Beta. The higher the number, the more volatile the stock. If you prefer to trade stress-free, just put all the stocks with high numbers on your Do-Not-Trade list.
Coinbase, for reference, currently has a Beta of 3.58 and an ATR of 12.35. Its average range for the last few weeks was over $12, which is 7% of its current price. And that Beta number means it tends to move roughly 3.5-3.7× the S&P 500 in either direction.
Tesla is the same problem with a different personality. Expensive, volatile, and driven by news and fan-boy sentiment that has nothing to do with chart levels. Tesla can gap $30 on an Elon tweet. No level holds when the news is loud enough. I hate trading Tesla.
TSLL, the leveraged Tesla ETF, at least gives you a smaller, more manageable version of the same thesis. Still not my favorite. But at least it’s tradeable without betting the session on one position.
3. It requires multiple things to go right simultaneously. COIN needs both Bitcoin and the Nasdaq to cooperate. If either one rolls over, COIN rolls over harder. That’s two variables you have to be right about instead of one. Double the ways to be wrong. When you’re already managing direction, entry timing, position size, and stop levels, adding a second correlated asset to the equation increases complexity and failure points.
4. It punishes you for the one good decision you made. This is the cruelest thing about COIN and stocks like it. You finally cut the loss — you do the right thing — and the stock immediately rips $15 in two candles. Now you feel worse for selling than you did for holding a losing position. The market has just punished your discipline and rewarded your mistake. That psychological damage lingers. You second-guess your stops on the next trade. You hold a little longer “just in case.” The Do-Not-Trade stock has now contaminated your process on everything else.
How to build your list
Start with honesty. Think back over your trade history and ask: which tickers show up repeatedly in my losses? Which ones do I dread seeing on my screen after I enter? Which ones do I trade only because someone else mentioned them, not because they fit my system?
Those are your candidates.
Then ask for each one: Is this stock actually incompatible with my style, or did I just have a bad trade? One bad trade doesn’t make a stock untradeable. A recurring pattern of bad trades on the same ticker, especially when you’re profitable on similar stocks, is a signal that you need to get away from that stock.
If you can’t think of your worst tickers from memory, you can upload your trades to trading software like TradeViz or TraderSync to find them.
Build the list. Write it down. Put it somewhere you’ll see it before the open.
And then honor it the way you’d honor a stop loss. Not as a suggestion. As a rule.
The “Do-Not-Trade” Criteria
If a stock hits three or more of these points, it belongs on your list:
- Too Expensive: The underlying price or option premiums are so high that you have to break your position-sizing rules or buy “lottery ticket” (OTM) contracts just to participate.
- Style Incompatibility: The stock moves in “straight lines” (momentum) while you are a mean-reversion (dip) trader.
- Excessive Variables: The ticker requires “multiple greens” to work (e.g., COIN needing both BTC and the Nasdaq to cooperate). This doubles your failure points.
- Volatility Overload: The Beta and ATR are significantly higher than your comfort zone (for me, a Beta of 3.5+ is clearly a “danger zone”).
- Punished Your Discipline: The stock frequently “fake-outs” your disciplined stops, training your brain to ignore its own rules on future trades.
It’s okay to get a divorce
You don’t have to trade every ticker. You don’t have to prove you can “handle” volatility, and you don’t need to vindicate yourself for past losses.
The market is enormous, with hundreds of stocks that fit your temperament perfectly. There is no award for trading the hardest ones.
Getting a divorce from a stock that keeps hurting you isn’t weakness; it’s self-awareness. It’s experience turned into policy. It’s what separates traders who last from traders who keep starting over.
Write the list. Stick to it. And the next time someone in a Discord room starts talking about their COIN position — close the tab.