What is the rule of thumb for a ramp?

Could you please elaborate on the "rule of thumb" for a ramp in the context of cryptocurrency or finance? Are you referring to a specific type of ramp, such as a gradual increase in price or volume, or a technical term related to trading strategies? Without more context, it's difficult to provide an accurate and concise explanation. However, in general, a "rule of thumb" is a practical principle or guideline that can be applied in a variety of situations. In finance and cryptocurrency, there are many such rules of thumb, ranging from simple investment advice to complex trading strategies. Could you please clarify which specific rule of thumb for a ramp you're interested in learning about?