The Know Sure Thing (KST) is a momentum oscillator developed by Martin Pring to make rate-of-change readings easier for traders to interpret. The KST measures price changes in four different time frames and combines them into one composite indicator. The resulting oscillator ranges from -100 to +100, with readings below zero indicating downward momentum and readings above zero indicating upward momentum.The KST can be used to identify trend reversals, as well as overbought and oversold conditions. Traders may also look for divergences between the KST and price action, as this can be an early warning sign of a potential reversal.