Group 1 - The article discusses the concept of relative strength from the Zulu principle, emphasizing its application in growth stock investment and the popularity of the PEG ratio due to this principle [1] - The relative strength compares the price movement of individual stocks against market indices, which is slightly different from the RS indicator mentioned in another source [1] - A formula for calculating relative strength using Tongdaxin is provided, illustrating how to derive the relative strength value [1] Group 2 - The output curve generated from the calculations is compared with an existing strength indicator (QR) in Tongdaxin, showing that both indicators are similar but have slight differences [2] - The QR indicator's formula is shared, indicating that it can also express the relative strength of the Zulu principle due to the underlying logic being the same [3]