MARKET trend is the map of the price movement of a stock
Price is decided by demand and supply
IF the demand exceeds supply price moves upward and vice versa
SO plot the(closing) price for a long period say for one year
one can understand whether price is going up or down or side ways
IF the the subsequent top and bottom are higher than the previous top and bottom respectively then the trend is upward called BULLISH
IF the subsequent top and bottom are lower than the previous top and bottom respectively then the trend is downward called BEARISH