What to expect from a free backtester
Free crypto backtesters range from code libraries (powerful, but you write the code) to web tools (easier, but often limited in data, assets, or features). The right one depends on whether you can code and how much rigor you need.
The key thing 'free' should never cost you is honesty: realistic fees, real historical data, and no future-peeking. A free tool that skips those isn't a bargain - it's a way to fool yourself cheaply.
Trade-offs to watch
Free tools earn their price somewhere. Common compromises:
- Limited history or assets, so you can't test across a full market cycle.
- No cost modelling, which flatters high-frequency strategies.
- Black-box results you can't audit - you see a number but not the trades behind it.
- A coding requirement that, for many people, is the real barrier.
What actually matters
Whatever tool you choose, judge it on the fundamentals: does it use real data over varied conditions, model realistic costs, avoid lookahead bias, and let you see the trades? Those determine whether a backtest is trustworthy far more than the price tag.
Testing an idea without code
Premiss lets you test a crypto strategy by typing it in your own words - no code - and shows you the real Python backtest, the trades, and a verified result on real market data, so you can see exactly what produced the numbers. It's the easiest way to go from idea to an auditable result.