Buying and Selling Pressure is swayed by what side (
Bullish or
Bearish) the majority of traders are on in regards to a specific security or trading instrument.
Buying Pressure
When the majority of traders are attempting to buy a specific security or instrument, buying pressure increases.
Selling Pressure
When the majority of traders are attempting to sell a specific security or instrument, selling pressure increases.
Source:
https://www.tradingview.com/stock-charts-support/index.php/Buying_and_Selling_Pressure
See also:
https://investorplace.com/2009/08/chart-analysis-buying-pressure/