## Why Recording Every Bet Is Not Optional
The bet log is the empirical foundation of your entire operation. Without it, you have no way to distinguish a genuinely profitable approach from an approach that feels profitable due to selective memory and confirmation bias.
The bet log is not a bureaucratic formality. It is the mechanism by which you convert experience into knowledge.
## What Every Entry Must Contain
At minimum, each bet entry should record:
| Field | Why It Matters |
|---|---|
| Date and time placed | Enables time-of-day and day-of-week analysis |
| Event and kickoff time | Links to result data |
| Selection and market | Enables market-type performance analysis |
| Bookmaker | Enables account-level analysis |
| Stake (units and currency) | Required for all financial calculations |
| Decimal odds | Required for P&L calculation |
| Result (W / L / V) | The outcome |
| Profit/Loss (units) | Net unit P&L |
| Closing odds (Pinnacle) | Required for CLV calculation |
| Model probability | Required for calibration analysis |
| Notes (one line) | Brief reasoning — key at review time |
## Maintaining the Log in Real Time
Log each bet the moment it is placed. Not at the end of the day. Not when you remember. The moment it is placed.
Delayed logging introduces selection memory bias: you unconsciously remember winners with more detail than losers. Real-time logging is immune to this.
## Cloud Backup
Your bet log must be backed up automatically (Google Sheets with Google account backup, or Excel with OneDrive/Dropbox sync). A corrupted spreadsheet representing 18 months of data is not recoverable from memory. The backup is insurance against catastrophic data loss.
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