Skip to content
CRYPTORG WIKI

True Strength Index (TSI)

True Strength Index — a double-smoothed momentum oscillator from -100 to 100. The True Strength Index (TSI) smooths price momentum (the price change) with an EMA twice: first over a long period, then over a short one. It is normalized by the double smoothing of the absolute momentum. Values range from -100 to +100. A crossover of the TSI with the signal line or zero produces trading signals.

Formula

Section titled “Formula”
PC  = Close - Close_prev
DS  = EMA(EMA(PC, long), short)
ADS = EMA(EMA(|PC|, long), short)
TSI = 100 * DS / ADS
Signal = EMA(TSI, signal_period)

Parameters

Section titled “Parameters”
ParameterTypeDefaultRange / Values
Long Periodint251-100
Short Periodint131-50
Signal Periodint71-50

Triggers

Section titled “Triggers”
TriggerDirectionConditionDescription
Signal line cross up🟢 BuyThe main line crossed the signal line from below to above — a buy signal.The TSI line crosses the signal line from below to above — a bullish crossover.
Signal line cross down🔴 SellThe main line crossed the signal line from above to below — a sell signal.The TSI line crosses the signal line from above to below — a bearish crossover.
Zero cross up🟢 BuyThe indicator line crossed zero from below to above — a buy signal.The TSI line crosses the zero level from below to above.
Zero cross down🔴 SellThe indicator line crossed zero from above to below — a sell signal.The TSI line crosses the zero level from above to below.
Slope turns positive🟢 BuyThe indicator’s slope turned positive — an upward reversal.The TSI line changes its slope from falling to rising — the indicator stopped falling and started rising.
Slope turns negative🔴 SellThe indicator’s slope turned negative — a downward reversal.The TSI line changes its slope from rising to falling — the indicator stopped rising and started falling.
Line diverges from signal↕️ BothThe distance between the main line and the signal line increased by the specified amount.The TSI line moves away from the signal line — momentum is strengthening.
Line converges to signal↕️ BothThe distance between the main line and the signal line decreased by the specified amount.The TSI line converges to the signal line: the distance shrinks, a crossover may be brewing.

Trigger parameters

Section titled “Trigger parameters”
ParameterTypeDefaultRange / Values
Min Delta (Line converges to signal, Line diverges from signal)float00>