Top-Down vs Bottoms-Up Research

Top-Down vs Bottoms-Up Research

There are two fundamentally different ways to find betting edge. Understanding both - and combining them - is how serious bettors operate.

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The Two Approaches

Think of it like buying a house:

Bottoms-Up (Fundamental): You study the house itself - square footage, condition, neighborhood, comparable sales. You determine what it's actually worth.

Top-Down (Technical): You study the market - what similar houses sold for, which direction prices are moving, what buyers are willing to pay. You determine what the market thinks it's worth.

Both tell you different things. Both matter.

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Bottoms-Up (Fundamental) Research

What it is: Building your own probability estimate from the ground up using raw data.

The Process

1. Collect player-level data (stats, usage, matchups)
2. Analyze context (injuries, lineups, pace)
3. Build a projection independent of the betting line
4. Calculate what you think the "true" probability is

Data You Use

The Goal

Establish a "fair price" - what YOU think the true probability is, regardless of what the sportsbook says.

Example

You project a player at 22.3 points tonight based on:

• Teammate out (+3.2 usage boost)
• Fast pace opponent (+1.1 opportunity)
• Favorable matchup (+0.8 efficiency)

The line is 19.5 points. Your fundamental analysis says over.

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Top-Down (Technical) Research

What it is: Using market signals - line movements, closing prices, sharp action - to find value.

The Process

1. Track where the line opened
2. Monitor how it moves and why
3. Identify sharp vs public money
4. Compare your timing to market efficiency

Signals You Watch

The Goal

Find where the market is slow, inefficient, or wrong - and bet before it corrects.

Example

A player prop opens at 19.5 points, but:

• Sharp books moved to 21.5 within an hour
• Soft books still show 19.5
• You grab 19.5 before it moves

You don't need your own projection. The market is telling you something is mispriced.

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Key Differences

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Which Works Better?

Neither alone is enough.

The Problem with Pure Fundamentals

Sportsbooks are really good at setting lines. They have:

• Massive data sets
• Sophisticated models
• Sharp bettor feedback

Beating them with fundamentals alone is hard. Your edge needs to be substantial.

The Problem with Pure Technical

Steam chasing can work, but:

• You're often late to the move
• You don't know why the line moved
• You can't evaluate if the move is correct

Following sharps blindly is a shallow strategy.

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The Power of Combining Both

This is where signal stacking comes in.

When your fundamental analysis AGREES with technical signals, you have confirmation.

The Combined Framework

1. FUNDAMENTALS: Build your own projection
   → "I think this player hits over."

2. TECHNICALS: Check market behavior
   → "Sharp money is also on the over."

3. CONFIRMATION: Both point the same way
   → "High conviction bet."

Why This Works

Scenario A is the sweet spot. Your analysis + market confirmation = highest conviction.

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Real Example

Player X prop: 18.5 rebounds

Your fundamental analysis:

• Center on opposing team is out
• Player X averages +4.2 rebounds vs backup centers
• Pace is slightly up (+1.3 possessions)
• You project 20.1 rebounds → Over

Market signals:

• Line opened 18.5, now at 19.5 at sharp books
• Steam detected on the over
• Soft books still at 18.5

Combined view:

• Fundamentals say over ✅
• Technicals confirm over ✅
• Price discrepancy exists ✅

Result: High conviction bet at the soft book's 18.5

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How DMP Uses Both

DMP combines these approaches:

1. Fundamental layer: We project opportunity based on lineups, injuries, pace, and archetypes
2. Technical layer: We track line movements and identify slow-adjusting markets
3. Signal stacking: We highlight when both align

When you see multiple signals pointing the same direction in DMP, that's fundamentals + technicals working together.

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Action Items

1. Don't rely on just one approach - Build fundamental views AND watch the market
2. Look for confirmation - When both agree, increase conviction
3. Be cautious when they conflict - If sharps are betting the opposite of your analysis, dig deeper
4. Time matters - Get your bet in before the market catches up

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The best bettors do both. They form opinions (bottoms-up) and validate with the market (top-down). Signal stacking isn't just about multiple data points - it's about multiple research philosophies pointing the same direction.