"What should I do if the market changes?"
I get this question quite often.
I think the people asking it are usually very serious.
My strategy might stop working one day.
It might no longer fit the current market.
Something that used to work might suddenly stop working.
So they want to know what to do when that happens.
At first glance, it looks like a very reasonable question.
But every time I hear it, I think it is dangerous.
Because several misunderstandings are hidden inside it.
You lose a little.
You enter a losing streak.
Price does not extend the way you expected.
A period comes where it feels like nothing is moving forward.
And every time, this thought appears in your mind.
"Maybe the market has changed."
First, you should not accept this question as it is.
If you start arguing about what counts as the market changing, there is no end to it.
What the person is probably really asking is this.
"What should I do if this strategy no longer produces profit over time?"
"What should I do if something that had an edge no longer works?"
In other words, the real issue is not "the market changing."
It is the fear that the edge of your own strategy has disappeared.
So think about this.
Did that strategy truly have an edge in the first place?
And has that edge truly disappeared?
What do you need in order to judge that?
The answer is a large sample size.
You can only know whether your strategy truly has an edge through a large sample size.
And you can only know whether that edge has disappeared through a large sample size.
In other words, at the exact moment you feel, "maybe the market has changed," it is almost impossible to know whether the edge has actually disappeared, or whether this is just variance, just a losing streak, or just a drawdown.
Too many people do not understand this.
If something can be judged from such a small sample, it was never an edge in the first place.
What you should truly worry about is not the market changing.
What you should truly worry about is that your consistency will break before you ever reach a sample size large enough to understand what is actually happening.
This may hurt to hear.
But this is the essence.
You are worrying very early about something that cannot be judged until much later.
But continuing to follow the same rules until that point is far more difficult.
The real problem is not the market itself.
The real problem is that you stop trusting your own judgment before you ever reach a sample size large enough to know what your system is actually producing.
In the first place, do you truly understand your strategy through a large sample size?
Have you seen the losing streaks that appear inside it?
Have you seen the drawdowns?
Have you seen the periods where nothing happens?
Have you seen the periods where price does not extend as expected?
After including all of that, did you confirm that the strategy still produces profit overall?
If this work is not finished, the losing streaks and flat periods you may have accepted during testing will look abnormal when they appear live.
You do not know what your strategy produces.
You do not know what can happen normally.
So when a short term fluctuation appears in live trading, you look at it and think, "maybe the market has changed."
The order is wrong.
First, you need to know what your system produces.
To do that, you need to keep testing under the same conditions.
You need to build a large sample size without changing the rules halfway, without excluding results you do not like, and without changing your interpretation after seeing the outcome.
In other words, consistency is already required at the testing stage.
But many people cannot even stay consistent there.
They draw conclusions from small samples.
They change the conditions after a few losses.
They feel safe by looking only at favorable periods.
They treat results they do not want to see as exceptions.
And then they think they understand their strategy.
Of course they become anxious when they enter live trading in that state.
Because they do not have the foundation required to trust that strategy.
The same thing happens in live trading.
Live trading is not a place to judge a strategy from a few results.
It is a place to keep repeating the rules you already verified under the same conditions and continue building the sample.
Yet many traders try to draw conclusions from a meaningless small sample size.
A few losses.
Recently things are not going well.
The movement is different from what they expected.
That is enough for them to start thinking, "maybe the market has changed."
Too early.
One splash of water is different from another.
But from a distance, it is a wave, the ocean, and the same water.
If you only stare at each splash, everything looks different.
Every time, you will want to say, "this is different from before."
But a trader's job is not to react to each splash.
What conditions is your system designed to trade under?
What happens when those conditions are repeated across a large sample size?
That is what you need to look at.
Without knowing that, thinking about "what to do if the market changes" is meaningless.
What you should truly worry about is not whether your strategy will be proven invalid someday.
What you should truly worry about is whether you can maintain consistency long enough to understand what your system actually produces.
Know what your strategy produces.
Test it through your own hands.
Practice through your own hands until you have passed through losing streaks, drawdowns, and periods where nothing happens.
Do not say "the market changed" without that foundation.
You are not looking at the market.
You are only looking at your own anxiety.
A person who has truly finished that level of preparation does not even have the anxiety, "what if the market changes?"
📚 Content for serious traders
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Thank you for reading.
Having a system with an edge is a given.
But that alone isn't enough to succeed.
Because traders themselves constantly doubt whether it really has an edge.
And they always end up abandoning it at the worst possible moment.
In 2025, we interviewed over 100 of the best traders in the world.
They gave us their secrets on how to become profitable and make money trading long term.
Here are the lessons that made them millionaire traders:
What monthly return should you aim for? 🧵
Most people care deeply about how much they can make in a month.
They also care about the monthly returns of other people’s strategies.
But ironically, it’s that focus on monthly return that keeps you from succeeding.
🧵1/5
To stop hesitating on your entries 🧵
Don't hesitate about whether to enter.
You will start seeking the answer to your hesitation in whether that one trade "won or lost," and from there, your consistency will begin to crumble.
🧵1/5