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Notes

Short guides on what to understand before following a trading system. Information, not financial advice.
What a drawdown is, and why to look at the decline before the return

What a drawdown is, how it is measured and why it is the number that determines whether a trading system can be followed. With framed examples.

September 14, 2026 · Read the note →
Market orders at the open: how an "end of day" signal is executed and what slippage costs

How an end of day trading signal is executed with a market order at the New York open, what slippage is and what it costs in money.

September 14, 2026 · Read the note →
CEDEARs or an account abroad: how to trade US stocks from Argentina

CEDEARs or an account abroad to trade US stocks from Argentina: hours, currency, ratios, liquidity and costs, with no broker recommendation.

September 14, 2026 · Read the note →
Survivorship bias: why 51% of the companies in a backtest no longer trade

What survivorship bias is in a backtest, why 51% of the companies in a historical universe no longer trade, and how to spot it in someone else's results.

October 1, 2026 · Read the note →
How to place the orders with your broker

Step by step for placing the orders in Interactive Brokers and Schwab/thinkorswim: at-the-open or market order, and what changes between them.

September 29, 2026 · Read the note →
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