[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"indicator-downday-en":3},"# Down Day (DOWNDAY)\n\n> StratCraft indicator page for DOWNDAY.\n\n**Route**: `\u002Findicators\u002Fdownday\u002F`\n\n## What It Does\n\nDOWNDAY measures whether the current bar closed lower than the prior bar. It is a simple directional utility indicator.\n\n## Formula\n\n`Down Day = 1 when Close \u003C Previous Close, otherwise 0`\n\n## Parameters\n\n- `period` - default `14`\n\n## C++23 API\n\n```cpp\n#include \u003Cnonabt\u002Findicators\u002Fdownday.hpp>\nauto downday = std::make_unique\u003Cnonabt::DOWNDAY>(data(), 14);\n```\n\n## Common Usage\n\n- Use DOWNDAY for direction counting.\n- Combine it with rolling windows.\n- Useful as a Boolean input to custom logic.\n\n## Practical Pattern\n\nA high count of down days can indicate persistent selling pressure.\n"]