Remove multiple Pine Script indicators: SSFDSP, STARCHANNEL, STBANDS, STC, UBANDS, UCHANNEL, VWAPBANDS, and VWAPSD. These indicators were deleted to streamline the library and remove unused or redundant code.

lib/trends_IIR/ltma/ltma.pine

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+// The MIT License (MIT)
+// © mihakralj
+//@version=6
+indicator("Linear Trend Moving Average (LTMA)", "LTMA", overlay=true)
+
+//@function Calculates Linear Trend MA using dual EMA with linear extrapolation
+//@param source Series to smooth
+//@param period Lookback period (determines alpha = 2/(period+1))
+//@returns LTMA value: EMA-based linear trend projection from first bar
+//@description LTMA tracks both level and slope using two cascaded EMAs,
+//  then extrapolates the linear trend forward. Unlike DEMA (which cancels
+//  first-order lag via 2×EMA1 − EMA2), LTMA estimates the instantaneous
+//  slope from the EMA difference and projects it forward by the full period:
+//    slope = (EMA1 − EMA2) / (decay − 1)
+//    LTMA  = EMA1 + slope × period
+//  where decay = (1 − alpha). This produces a predictive moving average
+//  that follows linear trends with zero steady-state error.
+//  Uses §2 exponential warmup compensator on both EMAs (e*=beta,
+//  c=1/(1-e)) for valid output from bar 1.
+ltma(series float source, simple int period) =>
+    if period <= 0
+        runtime.error("Period must be greater than 0")
+    float alpha = 2.0 / (period + 1)
+    float beta  = 1.0 - alpha
+
+    var bool  warmup = true
+    var float e      = 1.0
+    var float ema1   = 0.0
+    var float ema2   = 0.0
+    var float result = source
+
+    float src = nz(source)
+
+    ema1 := alpha * (src - ema1) + ema1
+    ema2 := alpha * (ema1 - ema2) + ema2
+
+    if warmup
+        e *= beta
+        float c = 1.0 / (1.0 - e)
+        float comp1 = c * ema1
+        float comp2 = c * ema2
+        float slope = comp1 - comp2
+        result := comp1 + slope * period
+        warmup := e > 1e-10
+    else
+        float slope = ema1 - ema2
+        result := ema1 + slope * period
+    result
+
+// ---------- Main loop ----------
+
+// Inputs
+i_period = input.int(14, "Period", minval=1)
+i_source = input.source(close, "Source")
+
+// Calculation
+ltma_value = ltma(i_source, period=i_period)
+
+// Plot
+plot(ltma_value, "LTMA", color=color.yellow, linewidth=2)