Furthermore, the beginning pitch and the ending pitch of a tone is central to distinguishing words. Slightly different beginning or ending pitch means different words. On the other hand, the highest point in a stress can be any degree of pitch above the unstressed syllables. The difference doesn't matter as long as the stress rises above the other syllables. There are several ways of representing tones in Romanization.
Some phonetic transcriptions use single digit numbers.
Neither system directly indicates the tone. There are two other systems that do directly illustrate the tonal change. One uses a vertical bar to denote a scale, and horizontal or diagonal lines to represent the change in pitch. The best system that I have seen is a two digit number, ranging from 1 to 5. Together, it tells you which pitch to start and which to end.