Seeing the spread change is one big reason I run both B and A lines...another is it shows when I hit a "nervous" candle..ifyou watch the lines carefully you will sometimes just before a break up or break down you may see the B/A lines run pretty tight but at same time begin some rapid jerking around...I call it a "nervous" candle and sometimes sgnal a change in action.Its little things like that I've always watched for in price action trading.If you never heard of it its because its only in my book..plainly seen at bottom of page 767(LOL)
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