[TVT] VIX Short Term Danger

//@version=5
indicator(title="[TVT] VIX Short Term Danger", shorttitle="[TVT] VIX-RISK", overlay=false)

// Input parameters
short_ma_length = input.int(3, title="Short MA Length", minval=1)
long_ma_length = input.int(8, title="Long MA Length", minval=1)
ma_type = input.string("EMA", title="MA Type", options=["EMA", "SMA"])

// Single selection for VIX timeframe
vix_option = input.string("VIX9D", title="Select VIX", options=["VIX9D", "VIX", "VIX3M", "VIX6M"])

// Fetch VIX data using chart's timeframe
vix9d = request.security("VIX9D", timeframe.period, close)
vix1m = request.security("VIX", timeframe.period, close)
vix3m = request.security("VIX3M", timeframe.period, close)
vix6m = request.security("VIX6M", timeframe.period, close)

// Function to calculate MA based on type
calcMA(source, length) =>
    ma_type == "EMA" ? ta.ema(source, length) : ta.sma(source, length)

// Calculate MAs
short_ma_9d = calcMA(vix9d, short_ma_length)
long_ma_9d = calcMA(vix9d, long_ma_length)

short_ma_1m = calcMA(vix1m, short_ma_length)
long_ma_1m = calcMA(vix1m, long_ma_length)

short_ma_3m = calcMA(vix3m, short_ma_length)
long_ma_3m = calcMA(vix3m, long_ma_length)

short_ma_6m = calcMA(vix6m, short_ma_length)
long_ma_6m = calcMA(vix6m, long_ma_length)

// Define colors with transparency
purple_transp = color.new(color.red, 40)
orange_transp = color.new(color.orange, 50)

// Adjust background colors based on short_ma_9d vs short_ma_3m comparison
green_transp = short_ma_9d < short_ma_3m ? color.new(color.green, 80) : color.new(color.green, 90)
red_transp = short_ma_9d > short_ma_3m ? color.new(color.red, 80) : color.new(color.red, 90)

// Get current short and long MA values based on selection
current_short_ma = switch vix_option
    "VIX9D" => short_ma_9d
    "VIX" => short_ma_1m
    "VIX3M" => short_ma_3m
    "VIX6M" => short_ma_6m

current_long_ma = switch vix_option
    "VIX9D" => long_ma_9d
    "VIX" => long_ma_1m
    "VIX3M" => long_ma_3m
    "VIX6M" => long_ma_6m

// Set background color based on MA crossover
bgcolor(current_short_ma > current_long_ma ? red_transp : green_transp)

// Plot based on selection
plot(vix_option == "VIX9D" ? short_ma_9d : na, color=purple_transp, style=plot.style_line, linewidth=2)
plot(vix_option == "VIX9D" ? long_ma_9d : na, color=orange_transp, style=plot.style_line, linewidth=1)

plot(vix_option == "VIX" ? short_ma_1m : na, color=purple_transp, style=plot.style_line, linewidth=2)
plot(vix_option == "VIX" ? long_ma_1m : na, color=orange_transp, style=plot.style_line, linewidth=1)

plot(vix_option == "VIX3M" ? short_ma_3m : na, color=purple_transp, style=plot.style_line, linewidth=2)
plot(vix_option == "VIX3M" ? long_ma_3m : na, color=orange_transp, style=plot.style_line, linewidth=1)

plot(vix_option == "VIX6M" ? short_ma_6m : na, color=purple_transp, style=plot.style_line, linewidth=2)
plot(vix_option == "VIX6M" ? long_ma_6m : na, color=orange_transp, style=plot.style_line, linewidth=1)