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Short guides to testing trading strategies carefully. They are general education: none of them tells you what to trade.
What is paper trading, and why test a strategy there first?Paper trading means running a strategy with virtual money at live prices. What it can tell you, what it can't, and how to judge the results.Seven backtesting mistakes that make a strategy look better than it isLook-ahead bias, survivorship bias, ignored costs, overfitting and more: common ways a backtest flatters a trading strategy, and how to check for them.Self-hosted vs cloud trading software: what's the difference?Self-hosted trading software runs on your own PC or server; cloud platforms run on someone else's. The trade-offs in control, privacy, cost and upkeep.
General education, not investment advice. Trading involves risk of loss; backtests and paper results are hypothetical and do not predict future results.