Product guide
Scanner Guide
A scanner narrows the market to candidates that satisfy repeatable conditions. It does not replace chart review, risk planning or independent judgement.
Build a useful scan
Start with a clear market behaviour, then add only the filters required to define it.
- Choose a universe and timeframe.
- Begin with liquidity, such as average countervalue, so the result set is tradable for your process.
- Add trend, momentum or volatility conditions.
- Run the scan, inspect examples and adjust one rule at a time.
Avoid overfitting: a scan with many tightly tuned conditions may describe the past perfectly but be too restrictive or fragile for future use.
Common scan ideas
| Idea | Typical building blocks |
|---|---|
| Trend continuation | Price above a long moving average, positive moving-average slope, constructive RSI. |
| Breakout | Price near or above a recent high, sufficient countervalue, volume above average. |
| Oversold reversal | Established trend, temporary RSI weakness, controlled distance from recent highs. |
| Volatility contraction | Narrow Bollinger width or range, then monitor for expansion and volume confirmation. |
Review scanner results
Open each promising result in the chart and ask four questions: Is there enough liquidity? Is the trend aligned with the idea? Where is invalidation? Is there enough room to a logical target?
Save a scan only after it has a name that explains its purpose and after you have reviewed results across different market conditions. For function syntax and every available condition, use the gsEasyScript reference.