When developing trading systems, I often think in terms of what I call a Strategy Sphere.
The idea is simple.
Before looking for an answer, I first decide where I am willing to look.
That boundary becomes my sphere.
The purpose of the sphere is not to prove that answers do not exist elsewhere. In fact, better answers may exist far outside it. The sphere simply defines the area in which I choose to search.
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A Sphere Exists Before the Answer
People often focus on finding the best trading method.
I tend to approach the problem differently.
Before asking whether an answer is good or bad, I ask a different question:
Is that answer inside my sphere?
Imagine a system that can multiply an account by one thousand.
At first glance, it sounds extraordinary.
But what if it requires holding a position for one hundred years before exiting?
Theoretically, the answer may be correct.
Practically, it is outside my sphere.
Therefore, I never search there.
The sphere does not determine what is true.
It determines what is worth exploring.
Day Trading as a Time Sphere
Day trading provides a simple example.
A day trader works within a sphere that begins and ends during a single trading day.
Holding a position overnight may produce better results.
Holding it for a week may produce even better results.
That possibility is not denied.
It is simply ignored.
Those answers belong to a different sphere.
Viewed from this angle, day trading is not merely a trading style. It is a decision to search for answers within a one-day sphere.
The 200-Pip Sphere
I use a similar concept when developing EAs for Alpha Trading.
In many cases, I begin with a stop-loss sphere of 200 pips.
This means my search is intentionally limited to that area.
A better answer may exist at 250 pips.
An even better answer may exist at 500 pips.
I do not reject those possibilities.
I simply choose not to pursue them.
The purpose of the sphere is not to discover every possible answer. The purpose is to create a workable search space.
Interestingly, the final result often ends up being much smaller.
A completed system may settle on a stop-loss of:
- 15 pips
- 20 pips
- 30 pips
The specific number is not the important part.
What matters is where the answer was found.
Reading Other Systems Through Their Sphere
The concept is useful when examining other people’s trading systems.
Most traders focus on visible results.
For example:
“This strategy has an 80% win rate.”
That may be true.
However, I am often more interested in the sphere behind the result.
What time horizon does it assume?
How large is the acceptable loss?
How long are positions expected to remain open?
What type of risk is considered acceptable?
The answers to those questions define the sphere.
Once the sphere becomes visible, the method often looks very different.
A high win rate may depend on an unusually large stop-loss.
A profitable system may require months of patience.
The result is only part of the story.
The sphere tells you where the story was written.
Constraints Create Ideas
Some people view boundaries as limitations.
I often view them as tools.
Without boundaries, every possibility remains open.
Every holding period is valid.
Every stop-loss distance is valid.
Every target is valid.
The search space becomes enormous.
As a result, finding practical answers becomes more difficult.
A sphere reduces the size of the problem.
Once the boundaries are defined, creativity begins to emerge within them.
How can performance be improved inside the sphere?
How can risk be reduced inside the sphere?
How can efficiency be increased inside the sphere?
Many good ideas appear not because constraints are absent, but because they exist.
Closing Notes
A Strategy Sphere is simply a defined area of exploration.
For a day trader, it may be a single trading day.
For an EA developer, it may be 200 pips.
For someone else, it may be a specific amount of capital, a specific holding period, or an entirely different limitation.
The sphere does not claim that better answers do not exist outside it.
It merely acknowledges that no search can be infinite.
Every method begins with a boundary.
The answer comes later.
In that sense, creating a trading system may be less about finding the perfect answer and more about deciding where the search begins and where it ends.
