RSI in Python: Wilder's Formula and Live Candle Updates
Calculate RSI in Python with Wilder's smoothing, check a worked example and update live candles without counting the same bar twice.
Category · Developer Tutorials
Developer Tutorials
Practical guides for using the SiftingIO API and WebSocket streams.
Latest in Developer Tutorials
Bollinger Bands in Python: OHLCV Data and Live Prices
Calculate Bollinger Bands in Python with pandas, verify the math, plot OHLCV closes and add live WebSocket prices without confusing ticks with candles.
Candlestick Chart in Python with Plotly and OHLCV Data
Build a Python candlestick chart with Plotly and Bitcoin OHLCV data. Add volume, handle UTC timestamps, and save an interactive HTML chart with SiftingIO.
Forex API JSON: build a multi-pair watchlist in JavaScript
Build a forex watchlist from one SiftingIO JSON snapshot. Use Node.js to request multiple pairs, preserve missing rows and label timestamps correctly.
Normalize prices to 100 in Python: compare market data
Compare forex, gold, stocks and crypto on one chart. Rebase prices to 100 in Python with a shared baseline, tested pandas code and clear handling of gaps.
Market data API caching: TTL, cache keys and shared requests
Cache market data API responses with a tested Node.js example. Learn TTL, request coalescing, safe cache keys and why cache age is not price age.
Currency conversion in JavaScript: rates, rounding and formatting
Build a JavaScript currency converter with direct and inverse FX rates, exact decimal rounding and Intl.NumberFormat. Includes code, examples and tests.
Market data monitoring with Prometheus: detect old prices and silent feeds
Monitor tick age, silent feeds and failed market-status polls with a small Python metrics adapter, Prometheus alerts and a credential-free demo.
API key 401 Unauthorized: fix headers, keys and access errors
Diagnose SiftingIO API key errors with a 401/403 comparison table, curl checks and a Python test that keeps credentials out of logs.