---
title: 'How-to: Comparand Blog guides'
url: https://comparand.xyz/blog/topic/how-to
description: Every Comparand Blog guide about how-to.
updated: '2026-10-21'
---

# How-to

- [CCXT vs a hosted data API: which for crypto history?](https://comparand.xyz/blog/ccxt-vs-hosted-crypto-data-api.md): CCXT is a free library that asks each exchange for candles. A hosted API stores them for you. See when each fits, plus measured exchange differences.
- [Crypto position sizing by volatility: the math, real numbers](https://comparand.xyz/blog/position-sizing-by-volatility.md): Position size is your risk divided by your stop distance. The math, and why a stop set by each coin's own hourly range was hit about as often on 10 coins.
- [Find similar chart patterns in Python, or use an API?](https://comparand.xyz/blog/python-find-similar-chart-patterns.md): Build a similar-chart search in Python with pandas, or call a hosted one? The code steps, five pitfalls from look-ahead to overlap, and what each costs.
- [Freqtrade vs vectorbt vs Backtrader for crypto backtests](https://comparand.xyz/blog/freqtrade-vectorbt-backtrader-compared.md): Freqtrade, vectorbt, Backtrader and QuantConnect LEAN compared from their own docs: crypto data, live trading, licences, limits, and a look-ahead trap.
- [How many trades does a backtest need to be significant?](https://comparand.xyz/blog/how-many-trades-backtest-sample-size.md): Luck moves a 50% hit rate about 10 points at 100 trades and 3 at 1,000. Why your trades may not be separate, and what 3,600 real tests could not show.
- [How to backtest a crypto chart pattern: 5 ways compared](https://comparand.xyz/blog/ways-to-backtest-a-crypto-chart-pattern.md): Compare five ways to test crypto chart patterns, with real Bitcoin results showing why later dates and trading costs change the answer.
- [How to download Hyperliquid historical data and check it](https://comparand.xyz/blog/how-to-download-hyperliquid-historical-data.md): Get Hyperliquid candles, funding and liquidation data as whole-day files, check them with a hash, and spot gaps first. Real coverage numbers.
- [How wide should a crypto stop loss be? What the data shows](https://comparand.xyz/blog/stop-loss-distance-crypto-data.md): On Binance Bitcoin, a price 2% below was touched within a day 39.29% of the time, 1% below 63.54%. See 10 coins, ATR distances and what wicks do.
- [What is a markout in trading? How to check your fills](https://comparand.xyz/blog/trading-markouts-explained.md): A markout is the price move after your fill. Learn to work it out, what it says about being picked off, how fees count, and what a normal Bitcoin hour is.