Best Options Flow Indicators: How to Score Unusual Activity

Options flow data is noisy. On any given day, millions of contracts trade across thousands of tickers. Most of it is hedging, market making, or retail speculation that tells you nothing. The skill is in filtering for the 1% of trades that actually signal institutional conviction.

Here are the indicators that separate signal from noise, and a scoring system you can apply immediately.

1. Sweep orders

A sweep order is the clearest sign of urgency in the options market. Instead of placing a limit order and waiting, the buyer sends orders simultaneously to multiple exchanges, sweeping up all available liquidity at every price level. They're paying whatever it takes to get filled immediately.

Why it matters: a market maker placing a hedge doesn't sweep. A retail trader buying 10 contracts doesn't sweep. Sweeps are institutional traders who need to get a large position on quickly, usually because they're acting on time-sensitive information or conviction.

Not all sweeps are equal. A sweep for 500 contracts of a weekly option is more aggressive than a sweep for 100 contracts of a LEAPS. The shorter the expiration, the more the buyer is betting on an imminent move.

2. Ascending fills

When a large order fills across multiple price levels, the fill prices tell a story. Ascending fills mean each successive fill was at a higher price than the last. The buyer kept paying more as they exhausted each price level, which signals they want the position badly enough to chase the price.

Descending fills are the opposite and often indicate a less urgent or even hesitant buyer who's getting filled as the market moves against them.

In our backtesting, ascending fill sweeps outperform descending fill sweeps by a meaningful margin. The ascending pattern correlates with informed trading because someone with conviction will pay up. Someone guessing will often get a better price because there's no urgency.

3. Premium size relative to open interest

A $500K premium trade is meaningless in AAPL options (billions trade daily). The same $500K trade in a mid-cap with $2M in total open interest is a major event. Always normalize premium against the stock's typical options activity.

The metric to watch is premium-to-open-interest ratio. When a single trade represents more than 10% of the existing open interest in that strike, someone is making a concentrated bet. When it represents more than 50%, it's either a very large institution or someone with information.

4. Expiration clustering

Where the activity concentrates on the expiration calendar tells you about the expected timeframe. Heavy activity in:

• 0-7 DTE (days to expiration): Betting on an imminent catalyst. Earnings, FDA decisions, court rulings.
• 14-45 DTE: Swing trade thesis. Expects the move within weeks.
• 90+ DTE: Structural position. Less about timing, more about direction over quarters.
• LEAPS (1 year+): Long-term conviction play. Often the most informative because the premium cost is high, so the trader has real skin in the game.

5. Put/call ratio context

The raw put/call ratio is one of the most misused indicators in trading. A high put/call ratio doesn't always mean bearish sentiment. Market makers delta-hedge their books constantly, generating put volume that has nothing to do with directional bets.

The useful version is the customer-only put/call ratio, which strips out market maker activity. When customers (non-market-maker accounts) are buying puts aggressively, that's a real sentiment signal. When the overall ratio spikes but customer activity is flat, it's just hedging noise.

6. Floor trades and large cap blocks

Some trades still execute on the physical exchange floor rather than electronically. Floor trades tend to be larger, more negotiated, and more likely to represent institutional activity. A floor trade in a large-cap name for significant premium is often a fund building a position through their floor broker, which adds a layer of conviction that electronic trades don't carry.

A practical scoring system

Here's a simple scoring framework. Each trade starts at 0 and gets points based on these criteria:

Score 5.0+: High conviction signal. Worth investigating immediately.

Score 3.0-4.9: Moderate signal. Add to watchlist, wait for confirmation.

Score below 3.0: Probably noise. Ignore unless other factors align.

This scoring system isn't magic. It's a filter. The point is to reduce thousands of daily trades to a handful that deserve your attention and research time.

Combining with other signals

Options flow is most powerful when combined with other institutional indicators:

• Dark pool prints: Large dark pool block + unusual call buying = strong bullish confluence
• Congressional trades: Committee member buying stock + call sweep in same name = multiple informed parties aligned
• Technical levels: Unusual call buying at a key support level suggests informed buyers see the floor holding
• Earnings calendar: Pre-earnings sweep activity is one of the most studied edges in options flow

Related: What Is Options Flow? | How to Read Dark Pool Prints | Congressional Trading Strategy