Custom TSI

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//version=5
indicator("Custom TSI", overlay = false)

// Input parameters for TSI settings
int longfLen = input.int(11, "Long Length", minval = 1)
int shortfLen = input.int(3, "Short Length", minval = 1)
int signalfLen = input.int(7, "Signal Length", minval = 1)

// Calculate TSI
tsi = ta.tsi(close, shortfLen, longfLen) * 100

// Calculate TSI Signal Line
tsiSignal = ta.ema(tsi, signalfLen)

// Plot TSI and Signal Line
plot(tsi, "TSI", color=color.blue, linewidth=2)
plot(tsiSignal, "Signal Line", color=color.red, linewidth=2)

// Highlight TSI crossing Signal Line
bgcolor(ta.crossover(tsi, tsiSignal) ? color.new(color.green, 90) : na, title="TSI Cross Up")
bgcolor(ta.crossunder(tsi, tsiSignal) ? color.new(color.red, 90) : na, title="TSI Cross Down")

// Alerts
alertcondition(ta.crossover(tsi, tsiSignal), title="TSI Cross Up", message="TSI has crossed above the Signal Line")
alertcondition(ta.crossunder(tsi, tsiSignal), title="TSI Cross Down", message="TSI has crossed below the Signal Line")