Why does the price fill back the FVG?
To understand this question, first, you need to know what the essence of the FVG is.
The essence of FVG: Large order volumes from institutions (Smart Money), causing insufficient matching of buyers and sellers, leaving a "trading vacuum" area on the chart.
Features: The market has an inherent tendency to "seek balance," and the FVG acts like a powerful magnet, likely attracting the price to return and fill it in the future. The larger the vacuum area created, the higher the probability of filling it, but it is not guaranteed.
"Price Magnet Effect"