Apollo line on the palm is also called the success line.
Major and Minor lines
Excerpt from Destiny Palmistry
Most palms have the major lines; a heart line, a line of the head (or Simian line) and the life line. Although some hand readers also like to refer to the Saturn and Apollo lines as major ones. The reason I do not is that they are not always in everyone’s hands, along with the fact that they are most likely to change along with the person’s circumstances. The major lines are what people tend to look at first when examining the palms because they are usually the longest and deepest. These lines can also subtly change over time; therefore, what is evident in your hands now, does not imply a fixed quality or event.
Prediction from the lines
When using the lines for prediction, gather information from the past trials that have led the person to be where they are now. Any lines or markings that represent the future are just assumptions. They show what is potential for the subject based on past actions, whether negative or positive. The reason prediction is based on assumption is because our hands have such a connection to our brain, that mental activity is recorded on our palms. As our thoughts and desires change, new lines can form, and old ones can fade.
Some lines change quicker than others
The lines that are most likely to change quickly are the minor lines. But most lines depict what is happening now and what has led to the current circumstances. Keeping in mind that any person can take control of their destiny, palmistry can be used to determine some consequences or guidance for our future. Accordingly, if a line shows an attribute, it is essential to look for other indications for confirmation; as one feature can offset another.
As an example, an Apollo line that shows success for a person may indicate this as a likely conclusion. However, if other signs are against it, such as the lack of willpower, the attainment of that success may be difficult; (but not impossible). Finding adverse marks should not be a bad thing, but instead an incentive for making positive changes for better future outcomes.
See an article about the Apollo line here