William %R, EMA Expiry Day Strategy

Trade Nifty expiry days using William %R and EMAs to identify 'trapped option writers' between 1:30 PM and 3:00 PM. This strategy focuses on selling options wit

Published · Updated · Methodology: Technical Indicators

Part of: EMA Strategies

  • Methodology: Technical Indicators
  • Content type: strategy
  • Timeframes: Not explicitly mentioned for chart, but strategy focuses on 1:30 PM to 3:00 PM window on expiry day.
  • Markets: Nifty (Indian Index Options)

Indicators used

  • William %R
  • Exponential Moving Average (EMA)

Source video

Decoded from: The 1:30 PM Expiry Day Strategy | How to Spot Trapped Option Writers by Dhan ⚡ — watch the original

Key timestamps:

  • 0:00 - Introduction to expiry day trading
  • 1:10 - Key market move times identified
  • 2:40 - Strategy starts after 1:30 PM
  • 3:45 - William %R indicator settings
  • 4:30 - EMA indicator settings
  • 5:00 - Long entry conditions explained (Put Option Sell)
  • 6:50 - Short entry conditions explained (Call Option Sell)
  • 8:20 - Risk management with Super Order and Stop Loss

Strategy overview

An exponential moving average tracks trend direction while weighting recent prices most heavily — but in this strategy the moving average is not what decides when a trade is possible. The clock is. The setup only comes alive inside a fixed late-session window on expiry day, roughly from 1:30 p.m. to 3:00 p.m., and the indicators are there to grade what happens inside that window rather than to hunt for signals across the whole session.

That framing comes from the source video, "The 1:30 PM Expiry Day Strategy | How to Spot Trapped Option Writers", published on the Dhan ⚡ channel. Its premise is that expiry sessions have a rhythm of their own: the video opens by identifying the specific times of day when the market tends to move, then argues that the final stretch of an expiry session is where positioning stress shows up most clearly — writers who are caught on the wrong side of a late move have limited time and limited room to defend it. The EMA supplies the trend reference and Williams %R supplies the stretched-versus-recovering read; the video devotes a dedicated segment to each indicator's configuration, and notably steers away from the default lookback on the oscillator, which is a reminder that a period-sensitive indicator behaves very differently over a ninety-minute window than it does over a full trading day.

Because the whole premise is time-bound and positioning-driven, this is a strategy whose context does not travel well: it presumes an expiry session, an options market where writer positioning matters, and a session that ends shortly after the window closes. This page catalogs the strategy as presented in its source; the video itself is the place to see how the author defines each piece and sequences them within the window.

Topics

william %r strategy · ema strategy · expiry day trading · nifty options strategy · indian markets · tradingview strategy · pine script · options selling · intraday strategy · technical indicators · momentum trading · swing trading · trading strategy

Frequently asked questions

What is an expiry-day trading strategy?

It is a strategy designed specifically for the session on which options contracts expire, when time value collapses quickly and open positions must be closed or settled. That deadline changes how price behaves compared with an ordinary session, which is why expiry-day setups usually carry rules about time of day rather than only about price.

Why does this strategy wait until 1:30 p.m. to start?

The source video argues that expiry sessions have identifiable windows where the meaningful move happens, and it places the tradeable window in the late part of the session — beginning around 1:30 p.m. and running to about 3:00 p.m. The earlier hours are treated as context rather than as opportunity.

What does "trapped option writers" mean?

Option writers are sellers who collect premium and profit when price stays away from their strikes. They become "trapped" when a late directional move pushes price through those levels near expiry, leaving little time for the position to recover — and their attempts to hedge or exit can add fuel to the move itself. Spotting that condition is the premise of the video.

How do Williams %R and an EMA work together in a setup like this?

Broadly, the EMA gives a directional reference — whether price is holding above or below a recent weighted average — while Williams %R measures where the current close sits within its recent high-low range, flagging stretched conditions and turns. Combining a trend reference with a range oscillator is a common way to avoid taking momentum signals against the prevailing direction. Strategy Decoder catalogs strategies like this one from their video sources so you can review the concept before testing anything on your own charts.

About this strategy page

This trading strategy was decoded by Strategy Decoder's AI from a public YouTube trading video and turned into a structured, reviewable specification. In the interactive app this page shows the full entry and exit logic, risk management settings, the indicators involved with their parameters, AlgoWizard-compatible logic and a Pine Script export ready for TradingView backtesting — plus an automated backtest verdict when one has been computed for this strategy.

Strategy Decoder catalogs 2,229 decoded strategies. Each one is extracted with confidence scoring, cross-linked to the indicators it uses, and kept up to date as new videos are processed daily. Load this page with JavaScript enabled to use the interactive tools, or start from the strategy explorer to filter by methodology, market and timeframe.

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