The word "uptrend" suggests a positive move in direction, but the opposite antonym, "downtrend," expresses a negative downward direction. Downtrend implies a decrease or decline in rate or quantity, such as a stock market trend, while uptrend suggests an increase in sales or demand. Another antonym for uptrend might be "stagnation," meaning a state of inactivity or lack of movement. It signifies a level or stable condition where there is no progression or regression. In contrast, "growth" is an antonym that implies a positive development, which can be applied in different aspects such as personal or business growth.