Thinkscript If Statement

May 5th, 2015, 06:37 PM

Dear Fellow ThinkScript Coders of Big Mike Trading:

I am a beginning thinkscript programmer and I am learning the syntax of thinkscript pretty fast. However, I am having trouble with the if statements. I understand you can have one statement inside of an if block but is it possible to have multiple statements in an if block?

Not: if (condition) then <this> else <that>;

but: if (condition) then { <this>; <that>;};

Here is example code:

def alertMe =
if (Decrease) then {
Decrease.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);

Decrease.SetDefaultColor(Color.RED);

Decrease.SetLineWeight(3);
} else if (Increase) then {
Increase.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_UP);

Increase.SetDefaultColor(Color.BLUE);

Increase.SetLineWeight(3);
};

Alert(alertMe, "ICB", Alert.Bar, Sound.bell);
Alert(!alertMe, "No changes", Alert.Bar, Sound.bell);

Thank you in advanced.

May 8th, 2015, 08:31 AM

Update:

Dear Fellow ThinkScript Coders of Big Mike Trading:

I am having a problem with this block of code:

def alertMe =
if (Decrease) then {
Decrease.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);

Decrease.SetDefaultColor(Color.RED);

Decrease.SetLineWeight(3);
} else if (Increase) then {
Increase.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_UP);

Increase.SetDefaultColor(Color.BLUE);

Increase.SetLineWeight(3);
};

Thank you in advanced.

May 8th, 2015, 09:03 AM

i'm not a programmer, but i think you use if/else if when you have 3 conditions, and if/else when you have 2 conditions. looks to me you have 2 conditions, and should try if/else, not if/else if

May 8th, 2015, 10:13 AM

Thank you for your answer @shzhning. I will try out your suggestion. I will update whether this solved the issue.

May 8th, 2015, 10:27 AM

newuse

Update:

Dear Fellow ThinkScript Coders of Big Mike Trading:

I am having a problem with this block of code:

def alertMe =
if (Decrease) then {
Decrease.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);

Decrease.SetDefaultColor(Color.RED);

Decrease.SetLineWeight(3);
} else if (Increase) then {
Increase.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_UP);

Increase.SetDefaultColor(Color.BLUE);

Increase.SetLineWeight(3);
};

Thank you in advanced.

You dont need if-then-else

Code

                            
plot Dec = Decrease;
plot Inc = Increase;
Dec.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);
Dec.SetDefaultColor(Color.RED);
Dec.SetLineWeight(3);
Inc.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_UP);
Inc.SetDefaultColor(Color.BLUE);
Inc.SetLineWeight(3);

May 8th, 2015, 11:22 AM

growex

You dont need if-then-else

Code

                            
plot Dec = Decrease;

plot Inc = Increase;

Dec.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_DOWN);

Dec.SetDefaultColor(Color.RED);

Dec.SetLineWeight(3);

Inc.SetPaintingStrategy(PaintingStrategy.BOOLEAN_ARROW_UP);

Inc.SetDefaultColor(Color.BLUE);

Inc.SetLineWeight(3);

Does Inc or Dec still paint or show on the graph if the value is 0 or no?

May 8th, 2015, 05:55 PM

newuse

Does Inc or Dec still paint or show on the graph if the value is 0 or no?

PaintingStrategy.BOOLEAN_ARROW_DOWN - it will show down arrow only if "Decrease" variable value is true or 1.

May 10th, 2015, 10:01 PM

For a conditional variable (seems like you were trying to get to this in your post)

## Simple Conditional Variables Test
# Mobius
# V01.07.2014

# Variables:
def o;
def h;
def l;
def c;
def a;
def b;

# Calculations
o = (open + close[1]) / 2;
h = Max(high, close[1]);
l = Min(low, close[1]);
c = (o + h + l + close) / 4;

if c >= o
then {
a = 1;
b = 0;
} else if c < o
then {
a = 0;
b = 1;
} else {
a = Double.NaN;
b = Double.NaN;
}
AddLabel(1, "Close higher = " + a + " Close lower " + b, if a == 1 then color.green else color.red);

May 11th, 2015, 12:08 AM

mobiusrts

For a conditional variable (seems like you were trying to get to this in your post)

## Simple Conditional Variables Test
# Mobius
# V01.07.2014

# Variables:
def o;
def h;
def l;
def c;
def a;
def b;

# Calculations
o = (open + close[1]) / 2;
h = Max(high, close[1]);
l = Min(low, close[1]);
c = (o + h + l + close) / 4;

if c >= o
then {
a = 1;
b = 0;
} else if c < o
then {
a = 0;
b = 1;
} else {
a = Double.NaN;
b = Double.NaN;
}
AddLabel(1, "Close higher = " + a + " Close lower " + b, if a == 1 then color.green else color.red);

Thank you for your suggestion and the simple example @mobiusrts. It rejected this structure of the if statement for some reason but I will compare this example with my previous code to gain a better understanding of the if structure.

I just wish the TDAmeritrade Sink or Swim library contained an example that had more than one statement inside the if block. That threw me off along with the Human Readable Syntax following after that example.

Thank you for your time.

May 11th, 2015, 08:22 AM

I copied and pasted my original code from this forum and it plots the label fine. You likely missed some of the code in your copy and paste.

Thinkscript If Statement

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Thinkscript If Statement