The bid-ask spread is the gap between the highest price a buyer will pay and the lowest price a seller will accept. It is one of the most immediate costs of trading.
The bid is the best price standing on the buy side of the order book. Selling immediately means accepting it — which is why the bid, not the last traded price, values your position.
The momentum factor sorts assets by past relative performance, buying historical outperformers and selling underperformers across a defined investment universe.
The price-to-earnings ratio compares a share price with earnings per share. P/E needs context from history, peers, growth, and earnings quality before it can be called high or low.
The put/call ratio compares put activity with call activity using volume or open interest. It describes options-market structure but does not translate directly into bullish or bearish direction.
The spot market is where assets or commodities are bought and sold for near-term delivery, making it especially useful for reading immediate physical tightness.
The trading decision loop runs from market view to sizing to entry to exit to review, then feeds the next view. It is the process the plan's steps form when they run together.
The value factor ranks assets by valuation multiples such as book-to-market, P/E, or cash flow yield, capturing systematic long-term risk premia across baskets.
The VIX is a Cboe index designed to measure 30-day expected volatility from S&P 500 option prices. Its 'fear gauge' nickname is useful shorthand but can be misleading.
Tick data records every single executed transaction with exact timestamps, price, and volume, providing the foundation for microstructure and execution analysis.