Caveats
- Volume profile describes where business was done, not what happens next. It is context, not a signal.
- It needs reliable volume data. In fragmented or off-exchange markets the visible volume may not represent the full picture.
- Value Area at 70% is a convention inherited from Market Profile, not a law. Changing the percentage changes every level.
Derivatives 衍生品市场
做空：认为价格会下跌，提前向券商借入股票，卖出股票，待价格下跌后，再买回股票归还给券商，赚取差价。比如，某股票价格为100元，你认为价格会下跌到90元，你向券商借入10股，卖出得1000元，待价格下跌到90元后，再买回10股，归还给券商。
Risk measures — 最大回撤 (maximum drawdown), Sharpe ratio
Indicators and screens — 外内盘 (buy/sell volume split) 为基础 · MACD · KDJ · SAR · K 线 · 筹码区 · 大盘趋势（沪深，科创）· 市值决定大盘股还是小盘股 · F10 资料 · 主要题材
