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Visualize Option Premium Change and Decay in Real Time with Stolo

Option prices tell two stories. One driven by market movement, the other by time.

Stolo’s Change / Decay Chart helps you separate those stories, so you know when premiums are moving because of price and when they’re shrinking because of time decay.

Challenges Retail Trader Face​

Option traders often see premiums rise or fall but don’t know why. Is it because the underlying moved, or simply because time passed? Without a proper breakdown:

  • You can't tell if IV (implied volatility) or theta caused the change.
  • You can't measure how fast options are decaying across strikes.
  • You might misread range-bound decay as directional strength.

Stolo’s Change / Decay view makes this distinction visual and immediate.

Introducing Stolo’s Change/Decay Analysis​

Stolo’s Change/Decay analysis charts shows you how premium for a selected strike(s) (PE & CE) have changed & decayed throughout the intraday in the same screen,

What you’ll see:

  • Change View: Highlights intraday rise / fall in option price.
  • Decay View: Shows natural erosion (time or IV cooling).
Stolo’s Change/Decay in Stolo

How to access Stolo’s Change/Decay Analysis?​

  1. Go to Analysis → Change / Decay
  2. Select your instrument (NIFTY, BANKNIFTY, or stock) and expiry
  3. Choose if you wish to see the change/decay for selected strikes or for range of strikes
  4. If you choose a selected strike, you can add pairs of strikes from ATM/ ITM from the selection popup and view the changes in charts. If it's a range selection, you can choose the range bound strikes.
  5. You may hover on charts to see additional information

Frequently Asked Questions​

What does Change / Decay mean in options?
Change shows how much an option's premium moved during a period. Decay shows how much value it lost to time or volatility drop.
How does Stolo calculate Decay?
Stolo measures the drop in premium independent of underlying price move, isolating theta and IV effect.
Can I view both Calls and Puts together?
Yes — the chart displays them in overlapping manner for better understanding
Does the Change/Decay chart get updated live?
Yes, data refreshes in real time for indices and F&O stocks.
Can I see change/decay trends for future expiries?
Absolutely. You can switch to the expiries you wish to see and visually analyse the charts.

See What’s Driving Premiums. Is it the movement or decay?

Open the Change / Decay chart on Stolo and get instant clarity on why option prices behave the way they do.

Start with Trial Plan at just ₹299

Relevant Guides​

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Option Snapshot Chart - View OHLC & OI behavior
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Straddle Chain - Analyze total premium behavior
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