A trend can last for day(s), weeks and even months and doesn’t necessarily need momentum to continue moving. Trend is a sustained directional movement over a time. Momentum typically refers to the building of energy in a particular direction. For example, as part of an overall trend up, the market might be experiencing a lot of momentum to the upside, whereas the market may be in an overall trend up, but lacking any current momentum to push prices up and thus moving sideways but still in an uptrend. You can have a trend without momentum, and have momentum without a trend.