What is block size in FYERS Analytics and how do I use it?

What is block size in Heatmaps and how do I use it?

Block Size in the Heatmap controls how large or small each stock appears based on the parameter you select. It helps you visually compare stocks by scale, strength, or importance, depending on what you want to analyse.

Because Heatmaps offer many Block Size parameters, choosing the right one depends on the question you are trying to answer.

How Block Size works

  • Block Size represents the relative value of the selected parameter
  • Larger blocks indicate higher values; smaller blocks indicate lower values
  • Block Size does not indicate price movement unless a price-based metric is selected

Block Size parameter categories and when to use them

Market-based parameters

Use these when you want to understand the market importance of stocks.

  • Market Capitalisation

Example: If Block Size is set to Market Capitalisation, large-cap stocks like Reliance or TCS will appear much larger than mid- or small-cap stocks, helping you see where index weight is concentrated.

Annual financial parameters

Use these to compare companies based on business scale.

  • Revenue / Sales
  • Net Profit
  • Total Assets

Example: Setting Block Size to Revenue helps you quickly identify companies with large operating scale, even if their market capitalisation differs.

Growth parameters

Use these to highlight companies showing faster expansion.

  • Sales growth
  • Profit growth
  • Quarter-on-quarter or year-on-year growth metrics

Example: Using Profit Growth as Block Size can surface smaller companies that are expanding faster than established players.

Profitability and margin parameters

Use these to compare business efficiency.

  • Operating margin
  • Net profit margin
  • Return on equity (ROE)
  • Return on capital employed (ROCE)

Example: If Block Size is set to ROCE, capital-efficient businesses appear larger even if they are not the biggest by market cap.

Valuation parameters

Use these to analyse stocks based on valuation levels.

  • Price-to-Earnings (P/E)
  • Price-to-Book (P/B)
  • EV/EBITDA

Example: Using P/E as Block Size can help you visually separate high-valuation stocks from relatively cheaper ones within the same Universe.

Returns and price-based parameters

Use these to size stocks based on market performance.

  • 1-day, 1-week, or 1-month price returns
  • Longer-term returns

Example: If Block Size is set to 1-month return, stocks with stronger recent momentum appear larger, regardless of company size.

Quarterly parameters

Use these to focus on recent performance trends.

  • Quarterly revenue
  • Quarterly profit
  • Quarter-on-quarter growth metrics

Example: Quarterly profit as Block Size highlights companies with strong recent earnings performance.

Using Block Size with Block Colour

Block Size is most effective when paired with a contrasting Block Colour:

  • Large blocks with negative colour may indicate dominant stocks under pressure
  • Small blocks with strong positive colour may indicate emerging opportunities

What If?

ScenarioWhat it means
Most blocks look similar in sizeThe selected parameter does not vary significantly across stocks in the chosen Universe.
A stock is very large but coloured redBlock Size reflects scale or strength, while Block Colour reflects performance or valuation.
I am unsure which parameter to start withStart with Market Capitalisation, then switch to financial or growth metrics based on your analysis goal.

Last updated: 15 Dec 2025

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