Lesson Context Market Feed
SPY $776.34 -0.20%
QQQ $731.07 -0.14%
AAPL $305.93 +0.22%
MSFT $495.40 -0.30%
NVDA $225.16 -0.06%
XLK $190.01 -0.40%
Module 01 · Concepts

What a serious operator looks at first

The best review sequence usually starts with stability and explanation, not with total return.

Edge quality
Expectancy beats headline win rate

A modest win rate with strong payoff balance can be healthier than a flashy win rate that depends on one fragile trade pattern.

Risk path
Drawdown shape matters operationally

Two strategies can lose the same amount and feel completely different to run depending on streak length, recovery time, and concentration.

Context
Performance has to be read by regime

A system may still be healthy even after a weak phase if the market shifted outside its intended environment and the damage stayed within expected bounds.

In this lesson
  • Expectancy beats headline win rate
  • Drawdown shape matters operationally
Try it — overfitting

Tune a strategy hard enough and it fits the past perfectly — then falls apart on new data. Push the tuning up and watch the out-of-sample curve diverge from the in-sample one.

In-sample
—
Out-of-sample
—
Overfit gap
—
Optimization warning

Do not optimize to erase normal drawdown.

←Back to Optimization