Book Flip — Signal Playbook

What it detects

The order book swings from clearly ask-heavy to clearly bid-heavy (or vice versa) inside a single candle — a fast change of control at the touch.

How Book Flip paints across a heatmap row — the colour language it speaks on the live map.

How to play it

Use it as scanner context, not an automatic entry:

• Treat a flip as a potential turning point, not a confirmed reversal.
• The new heavy side is the direction the book is now leaning.
• Let the next candle or two resolve before committing.
• Strongest after a stretched move in the opposite direction (exhaustion → flip).

Confirmation

What strengthens the read:

• The new side holds for the following candle (it sticks).
• Aggressive flow / OFI confirm the new direction.
• Price makes a higher low / lower high in the flip’s direction.

Invalidation

What kills it:

• The book flips straight back — it was noise.
• Price ignores the flip and continues the prior trend.
• It happens on a thin, wide book (low conviction).

Risk & honest evidence

Respect the limits:

• Flips are common in choppy regimes and produce whipsaws.
• A single-candle event — easy to over-trade.
• Evidence: grounded in market-microstructure research. vyx's own live backtest is still accruing — treat this as scanner context, not a proven edge.