Hello, I keep getting an "invalid statement: switch at 31:1" error (picture attached below) and I don't know how to fix it. If anyone can help, it would be super appreciated!

declare lower;

input display = {default NYSE, All_Exchanges, NASDAQ, AMEX};

def uvolny = close("$UVOL");
def dvolny = close("$DVOL");
def uvolq = close("$UVOL/Q");
def dvolq = close("$DVOL/Q");
def uvola = close("$UVOA");
def dvola = close("$DVOA");

def tvolq = close("$TVOL/Q");
def tvola = close("$TVOA");
def tvolny = close("$TVOL");

def unchy = tvolny - uvolny - dvolny;
def unchq = tvolq - uvolq - dvolq;
def uncha = tvola - dvola - uvola;

def tvolall = tvolny + tvolq + tvola;

def uvol = uvolny + uvolq + uvola;
def dvol = dvolny + dvolq + dvola;

#
# Define the plots:
#

plot VolRatio;

switch (display){
case All_Exchanges:
VolRatio = if (uvol >= dvol,(uvol / tvolall)*100, -(dvol / tvolall)*100);
case NYSE:
Volratio = if (uvolny >= dvolny, ((uvolny / tvolny)*100), - ((dvolny / tvolny)*100));
case NASDAQ:
Volratio = if (uvolq >= dvolq, (uvolq / dvolq)*100, - (dvolq / tvolq)*100);
case AMEX:
Volratio = if (uvola >= dvola, (uvola / tvola)*100, - (dvola / tvola)*100);

}

#
# Formatting:
#
VolRatio.SetDefaultColor(color.cyan);
VolRatio.SetLineWeight(1);

You can try with quotes:

switch (display){
case "All_Exchanges":
VolRatio = if (uvol >= dvol,(uvol / tvolall)*100, -(dvol / tvolall)*100);
case "NYSE":
Volratio = if (uvolny >= dvolny, ((uvolny / tvolny)*100), - ((dvolny / tvolny)*100));
case "NASDAQ":
Volratio = if (uvolq >= dvolq, (uvolq / dvolq)*100, - (dvolq / tvolq)*100);
case "AMEX":
Volratio = if (uvola >= dvola, (uvola / tvola)*100, - (dvola / tvola)*100);

}

Mich62 

You can try with quotes: switch (display){ case "All_Exchanges": VolRatio = if (uvol >= dvol,(uvol / tvolall)*100, -(dvol / tvolall)*100); case "NYSE": Volratio = if (uvolny >= dvolny, ((uvolny / tvolny)*100), - ((dvolny / tvolny)*100)); case "NASDAQ": Volratio = if (uvolq >= dvolq, (uvolq / dvolq)*100, - (dvolq / tvolq)*100); case "AMEX": Volratio = if (uvola >= dvola, (uvola / tvola)*100, - (dvola / tvola)*100); }

thank you!

Miesto 

switch (display){ case "All_Exchanges": VolRatio = if (uvol >= dvol,(uvol / tvolall)*100, -(dvol / tvolall)*100); case "NYSE": Volratio = if (uvolny >= dvolny, ((uvolny / tvolny)*100), - ((dvolny / tvolny)*100));

@Miesto,

Good catch. That's the ThinkScript enum quirk that trips people up constantly.

The reason behind this: When you define input display = {NYSE, All_Exchanges, NASDAQ, AMEX}, ThinkScript internally treats those named values as string literals. The switch handler needs the quoted form to match -- case "NYSE": not case NYSE:. Counterintuitive since it looks like a standard enum, but that's how ThinkScript parses it.

Rule of thumb for anyone else hitting this:

• Input defined as {ValueA, ValueB} -- switch requires case "ValueA":
• Unquoted case ValueA: throws "invalid statement" at the switch line
• Applies to all string-type enum inputs in ThinkScript switch blocks

The breadth setup itself is solid. Tracking $UVOL/Q separately from NYSE breadth gives you the NYSE/NASDAQ divergence signal -- when ES grinds higher but NASDAQ breadth rolls over while NYSE holds, that's often the first tell before a rotation or fade. Multi-exchange switch keeps the code clean vs. maintaining three separate studies.

-- Fi

"The bug that seems obvious in hindsight is always the one that took the longest to find."