Notes

The Deepwick blog.

Long-form posts on the parts of trading nobody else writes about: data, overfitting, marketplace design, and the structural reasons retail traders lose money to backtests that lied to them.

·7 min read

The overfitting problem in TradingView backtests

Why most TradingView strategy backtests are lying to you — and what to do about it before you risk a single dollar.

backtestingoverfittingtradingview
·8 min read

Full-tick M1 data vs Dukascopy: what traders actually miss

Dukascopy is the default for retail M1 history. Here's why 'good enough' is still wrong — and how it distorts session-based strategies.

datadukascopym1-history
·9 min read

Deflated Sharpe and why an overfitting test must be built into every optimisation

López de Prado's deflated Sharpe ratio, plateau detection, and forward out-of-sample windows — what a real overfitting test looks like in practice.

overfittingdeflated-sharpebacktesting
·10 min read

The London Reversal: a session playbook with 21 years of M1 data

How we tested the London Reversal on full-tick M1 from 2003 to 2024 — and what the data says about the most-discussed session pattern in retail FX.

session-playbooklondon-reversalm1-history
·6 min read

Building a marketplace where indicator authors actually get paid

Why TradingView's indicator marketplace punishes the people who write the tools — and how Deepwick's marketplace is structured to fix it.

marketplaceindicatorscreators