FTD Detector

Follow-Through Day (FTD) Detector

The FTD Detector executes William O'Neil's legendary framework for identifying the exact mathematical turning point of a bear market. It actively scans massive index arrays to detect the explosive alignment of price and volume that historically signals a structural market bottom, allowing you to deploy capital before the rest of the world realizes the bull market has returned.

What is a Follow-Through Day?

In a devastating bear market, it is human nature to want to "buy the dip" and catch the bottom. But guessing bottoms destroys portfolios. A market will often rally for two days, suck in hopeful retail traders, and then violently collapse to new lows. This is known as a "dead cat bounce."

William O'Neil, the founder of Investor's Business Daily (IBD) and the creator of CANSLIM methodology, mathematically solved this problem. He realized that no massive bull market in history has ever begun without a deeply specific, institutional "Follow-Through Day" (FTD).

An FTD is an algorithmic confirmation that a rally is real. It requires extreme precision:

1. The market must hit an absolute low (Day 1).
2. The market must hold that low for at least three days.
3. Sometime between Day 4 and Day 20, the index must explode upward by at least 1.5%.
4. Crucially, the volume on that explosive up-day must be higher than the volume on the previous day.

If these exact conditions are met, the FTD triggers. It is the footprint of massive institutions (mutual funds, hedge funds) aggressively stepping back into the market and putting a hard floor under the economy.

The FTD Detector automatically monitors the major indices for these precise conditions, issuing a definitive "All-Clear" signal to start buying.

How Pierce AI Executes It

When you ask Pierce for FTD status during a bear market, it runs a specialized price/volume audit on the S&P 500 (SPY) and Nasdaq (QQQ):

1. Rally Attempt Identification: Pierce scans the most recent 45 days of trading to lock in the absolute lowest point. It designates the first day the index closes higher as "Day 1 of the Rally Attempt."
2. The "Held Low" Verification: It ensures that during Days 2 and 3, the market did not breach the Day 1 low. If the low is breached, the rally is dead, the count resets to zero, and Pierce tells you to keep your money in cash.
3. The FTD Algorithmic Scan: If the rally is alive and between Day 4 and Day 20, Pierce checks every single day's closing price and volume. It specifically hunts for a close >1.5% accompanied by a pure volume expansion.
4. Internal Breadth Cross-Reference: Institutional volume alone is not enough. Pierce taps into the market_breadth engine to verify if the broader market internal stocks are also participating in the rally. If the Index triggers an FTD but Market Breadth is collapsing, Pierce flags the move as highly suspicious.

Key Metrics & Deliverables

By running the FTD Detector, you receive a definitive roadmap out of the bear market:

• The FTD Status: You are instantly told if we are in an active "Confirmed Uptrend" or if we are still trapped in a "Rally Attempt" waiting for institutional volume.
• The Date Stamp: If an FTD occurred, Pierce tells you the exact date the institutions stepped in.
• The Execution Signal: Pierce synthesizes the FTD status with Market Breadth to provide rigid advice on capital deployment (e.g., "The FTD is confirmed and Breadth is expanding. Begin scaling aggressively into A-grade momentum setups.").

Example Prompts & Use Cases

You can actively push Pierce to monitor the macroeconomic pivot points using these prompts:

• "The QQQ looks like it's bouncing. Run the FTD Detector. Have we had a Follow-Through Day yet?"
• "We are 6 days off the recent lows in the S&P 500. Are we in a confirmed rally?"
• "Has William O'Neil's FTD criteria been triggered recently on the major indices?"
• "An FTD was triggered yesterday. Does the actual Market Breadth support the move, or is it a false positive?"

By explicitly asking for "FTD" or "Follow-Through Day," you trigger the O'Neil extraction sequence.

Methodology Notes & Limitations

The Follow-Through Day is the most powerful signal in growth trading, but it is not infallible:

• A Necessary Condition, Not a Guarantee: To be clear, every single massive bull market in history has started with an FTD. However, not every FTD turns into a massive bull market. O'Neil's research showed that about 30% of FTDs are false positives and fail. The FTD gives you permission to buy, it does not guarantee your trades will work.
• The 4-to-20 Window: Valid FTDs almost always occur between Day 4 and Day 20 of a rally attempt. If the market takes 35 days to finally have a massive up-day, the rally is a grinding, illiquid, and suspicious mess. Pierce prioritizes speed and volume.
• Listen to the Stop-Loss: If the market triggers a perfectly valid FTD, but two weeks later the index drops back down and breaches the original Day 1 low, the FTD is officially invalidated. You must sell your longs and raise cash immediately.

Built for the Trend Trader

You do not have to be the first one to the party to get rich in the stock market; you just need to be there while the music is playing loudly. The FTD Detector explicitly stops you from guessing bottoms while the knife is falling, and ensures you deploy your heaviest capital exactly when the massive institutions return to the field.

Note: The FTD Detector requires deep historical mapping of daily volume and price expansions across multiple indices, and is included in the Preferred tier and above.