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GrandpaGrizzly

Founding member #12 · joined Jun 2026

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Recent posts

Been burned by fixed volume thresholds for years

Strategies & Backtesting

25d

the spread guard at entry is fine, but what about the exit?

Automated Trading

Aug 2026

the last print lied to me for years and i never checked

Automated Trading

Aug 2026

Survivorship, and the names that are not in your data

Market Data & Research

Aug 2026

The infrastructure posts are the ones worth reading twice

Aug 2026

Borrowing methods across markets, and where it stops working

Strategies & Backtesting

Jul 2026

Your broker is a counterparty, not a utility

Jul 2026

Every strategy is a bet on a regime, whether you meant it or not

Strategies & Backtesting

Jul 2026

Market regime filter: when a trading strategy should do nothing

Strategy Library

Jul 2026

A plain-language summary of what a strategy actually does

Feature Requests

Jul 2026

A note on what beta means

Jul 2026

still keeping a paper log after all these years

Market Data & Research

Jun 2026

the dip buyer script in the library, and my 1998 scar tissue

Strategies & Backtesting

Jun 2026

The data you have shapes the strategies you can imagine

Market Data & Research

Jun 2026

What does the app do that I couldn't do with a spreadsheet and patience?

Jun 2026

Trusting the machine while it's in drawdown

Automated Trading

Jun 2026