---
title: "Screen for a crossing or a valuation band"
description: "Use a special relation in a screener: pick one of the six filters that offer them, choose a crossing, a price side or a valuation band, and set its window."
canonical_url: "https://fincanva.com/docs/screeners/screen-for-a-crossing-or-a-valuation-band"
last_updated: "2026-10-07"
md_url: "https://fincanva.com/docs/screeners/screen-for-a-crossing-or-a-valuation-band.md"
---

# Screen for a crossing or a valuation band

To screen for something that happened — a price crossing a line — or for a state, such as a market valuation band, add one of six filters and pick a [special relation](/glossary/special-relations) instead of a numeric operator.

A screener's filter strip: the asset type, then one chip per condition, each worded as the app words it, and the key that adds a filter.

## Steps

1. **Add a filter that offers them.** Select **Add filter** and pick one of the six: **SMA**, **Bollinger Bands** or **Stochastic** under **Technical** → Indicators, **Mkt SMA** or **Buffet Indicator** under **Market & Sector** (Market Technical and Market Fundamental), or **Sec SMA** (Sector Technical). On these filters the special relations replace the numeric operators.
2. **Choose the relation.** On SMA, Bollinger Bands, Mkt SMA and Sec SMA: **Crosses Above** or **Crosses Below** — the price crossed up or down through the line within the window — or **Price Above** or **Price Below**, where the price sits now. On Stochastic: **Fast Bullish Cross**, **Fast Bearish Cross**, **Slow Bullish Cross** or **Slow Bearish Cross** — the fast or slow line crossed up or down — or **Fast/Slow Bullish Cross** and **Fast/Slow Bearish Cross**, the fast line crossing up or down through the slow one. On Buffet Indicator, one of five valuation bands, highest to lowest: **Strongly Overvalued**, **Overvalued**, **In Range**, **Undervalued**, **Strongly Undervalued**.
3. **Set the window on a crossing**: 7, 14, 21 or 28 trading days, 28 by default. The condition passes when the crossing happened at any point inside it. The price and band relations take no window and no threshold.
4. **Read the You're saying line.** It restates the condition — "SMA crosses above (28 days)." for the default crossing on SMA.
5. **Select Apply.** The chip joins the strip in shorthand: `X-Above {N}d` for Crosses Above, `> Price` for Price Above, a band by its name.

**Done.** The chip sits in the filter strip — `SMA (252) X-Above 28d` for a default SMA crossing — and **Matches** counts the instruments for which the crossing happened inside the window, or which sit on the side or in the band you picked.

## What does the chip's shorthand mean?

Each relation shows in the chip as a short code; in a crossing's code, `{N}d` is the window in days, never a threshold.

| Relation | Chip |
|---|---|
| Crosses Above · Crosses Below | `X-Above {N}d` · `X-Below {N}d` |
| Price Above · Price Below | `> Price` · `< Price` |
| Fast Bullish Cross · Fast Bearish Cross | `Fast Bull-X {N}d` · `Fast Bear-X {N}d` |
| Slow Bullish Cross · Slow Bearish Cross | `Slow Bull-X {N}d` · `Slow Bear-X {N}d` |
| Fast/Slow Bullish Cross · Fast/Slow Bearish Cross | `F/S Bull-X {N}d` · `F/S Bear-X {N}d` |
| the five valuation bands | the band's own name |

The eight crossing codes stay in English in every language; the Price Above and Price Below chips and the five band chips are translated.

## What is the window on a cross relation?

The number on a cross relation is a **lookback window in trading days**, and the condition passes when the crossing happened at any point inside it. The choices are 7, 14, 21 and 28 days, and 28 is the default — so out of the box a cross relation asks "has this crossed in the last four weeks", not "did it cross today". A shorter window makes the test stricter, because the crossing has to be more recent to count.

**Price Above** and **Price Below** carry no window. They describe where the price is right now relative to the line, so they stay true for as long as the price stays on that side, while a cross relation goes false once the crossing ages past the window.

## What does a bullish moving-average cross look like?

Take the [SMA](/glossary/simple-moving-average-sma) filter with its default 252-bar average — roughly one trading year — on a stock that has been below that average for months and then rallies through it eight trading days ago.

- Pick **Crosses Above** and leave the window at 28 days. The crossing happened 8 days ago, inside the window, so the stock passes and the chip reads `SMA (252) X-Above 28d`.
- Narrow the window to 7 days. The same crossing is now one day outside it, and the stock stops passing — with no change to its price at all.
- Switch to **Price Above**. The window disappears, and the stock passes for as long as its price stays above the 252-bar average, whether it crossed eight days ago or eight months ago.

The three conditions read the same chart and select different things: a recent event, a recent-enough event, and a current state.

## Why can one condition empty the whole screen?

Because **Mkt SMA** and **Buffet Indicator** read the market rather than an [instrument](/glossary/instrument), a condition on them gates the entire screen: on a date where it fails, the [screener](/glossary/screener) returns no matches at all. **Sec SMA** gates whole sectors the same way — see [filter taxonomy](/glossary/filter-taxonomy). The five valuation bands are also mutually exclusive: on any date the reading sits in exactly one of them, so two conditions asking for two different bands match nothing.

A filter's **Advanced** inputs still apply on top of a special relation: the SMA filter's `Bars` sets how long the moving average is, and `Months Ago` shifts the whole reading back in time — see [lag, period, and multiplier](/glossary/lag-period-and-multiplier).

Fincanva is for education and illustration only. It is not personalised financial advice, and past or simulated results do not predict future ones. [Read the Terms Addendum](https://fincanva.com/terms/addendum#section-3)