smartx

Hi guys, I am new to technical analysis and trading in general. I am reading Tom William's Undeclared Secrets book on VSA and have a question that I could not find an answer to. What exactly is defined as an up bar and a down bar? In my charting software, an up bar is shown as green if the closing price is equal to or higher than opening price for that bar. Similarly a down bar is shown as red when the closing price of the bar is less than opening price. However, from the diagrams in the book, I seem to get the idea that an up bar is when the high of the current bar is higher than the high of previous bar and a low bar is when the low of the current bar is lower than the low of the previous bar. There could be multiple combinations of OHLC prices of two consecutive bars than could be used to define it as an up or low bar. I was hoping you guys could provide me some clarity on this. Thanks!