[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"indicator-bbands-en":3},"# Bollinger Bands (BBANDS)\n\n> StratCraft indicator page for Bollinger Bands.\n\n**Route**: `\u002Findicators\u002Fbbands\u002F`\n\n## What It Does\n\nBollinger Bands create a dynamic price envelope around a moving average. They are widely used for breakouts, fades, and volatility expansion detection.\n\n## Formula\n\n`Middle Band = SMA(n)`\n\n`Upper Band = SMA + (k * StdDev)`\n\n`Lower Band = SMA - (k * StdDev)`\n\n## Parameters\n\n- `period` - default `20`\n- `devfactor` - default `2`\n- `movav` - default `MovingAverageSimple`\n\n## C++23 API\n\n```cpp\n#include \u003Cnonabt\u002Findicators\u002Fbbands.hpp>\nauto bbands = std::make_unique\u003Cnonabt::BBANDS>(data().close(), 20, 2, \"MovingAverageSimple\");\n```\n\n## Common Usage\n\n- Use BBANDS for mean-reversion setups.\n- Use band breaks for trend continuation.\n- Use band width for volatility analysis.\n\n## Practical Pattern\n\nTrade a break above the upper band as momentum expansion or a return from the lower band as oversold mean reversion, depending on the broader regime.\n"]