A Zero Plus Tick is a financial term that refers to a transaction in which the price of a security increases by at least one tick (the minimum increment in price) but stays at the same bid-ask spread. In other words, it's when the bid price of a security rises, but the ask price stays the same.This term is commonly used in the context of short-term trading, where traders look for short-term price movements in the market to make a profit. A zero plus tick can be seen as a positive signal for the security and can indicate that there is buying pressure for the security.However, it's important to keep in mind that a zero plus tick is a short-term price movement and doesn't necessarily reflect the overall trend of the security or the market. Traders should consider multiple factors, such as market conditions and the fundamentals of the security, before making a trading decision.In conclusion, a zero plus tick is a term used to describe a specific type of price movement in the market, and it can be seen as a positive signal for a security. However, traders should always consider multiple factors before making a trading decision and should not rely solely on zero plus ticks to make investment decisions.