Uptrend

The upward case of a trend, defined by the structure of the swing highs and swing lows rather than by a general impression of rising prices. Both series have to progress. A market making higher highs while its lows sit flat is described more carefully as a range whose ceiling is being tested, and the distinction matters because the definition names the condition under which the description stops holding: a low that fails to hold above the previous one breaks the structure.

Several conventions exist for marking one mechanically, and they do not agree with each other. Some readers require price to hold above a rising moving average, some require a shorter average to sit above a longer one, some use a trend strength index above a customarily cited threshold, and some draw a trend line beneath the lows and treat the trend as intact while price stays above it. Each is a convention with a chosen parameter, and changing the parameter changes the answer. Time frame does the same: a chart can show an uptrend on one frame and a downtrend on the frame below it, and both readings are correct descriptions of different horizons.

The honest limitation is that the label is applied backwards. A trend is identified from swings that have already completed, and it is only known to have ended after the structure has already broken, which is exactly the point at which the description was most wanted. Whether trends persist long enough for that to be useful is one of the oldest live arguments in the field: momentum has been documented across markets and decades in the academic literature, and the same literature reports long periods in which it did not pay. Careful writing therefore treats an uptrend as a description of the sequence so far, not as a statement about the next swing.