Plot defaulColor based on a value

April 22nd, 2020, 07:04 PM

I want a line plotted across the chart that shows my average cost for the charted item. If the entry cost is less than the current price (I'm positive p/l) color the line green, else color it red.

The code below errors on the line:
posline.setDefaultColor(if price > (LastPrice) then Color.LIGHT_RED else Color.Green );

I have searched over two hours for a this simple requirement, to assign a color based on a decision, instead of hard coding the defaultcolor. I need it to be defaultcolor because I want the whole bar to be plotted the one color.

Code

def LastPrice = close(priceType = PriceType.LAST);
def price = GetAveragePrice();

plot posLine = HighestAll(if !IsNaN(price) and price > 0 then price else Double.NaN ) ;
posline.setDefaultColor(if price > (LastPrice) then Color.LIGHT_RED else  Color.Green );

May 18th, 2020, 03:31 AM

Hi,

In order to apply conditional color to a plot you need to use AssignValueColor. As you pointed out, just using that with your previous logic resulted in a the color switching as last price changes across the chart. To avoid that, I've changed the logic to get the last price from the last bar. I hard coded the average price, but thats just to provide some test value instead of a real average cost. I think this achieves what you were looking for.

Regards,
JayC

Code

def LastBar = !IsNaN(open) and IsNaN(open [-1]);

def LastPrice = HighestAll(If LastBar then close(priceType = PriceType.LAST) else Double.NaN);
def price = 290;

plot posLine = HighestAll(if !IsNaN(price) and price > 0 then price else Double.NaN ) ;
posLine.SetDefaultColor(Color.GRAY);
posLine.AssignValueColor(if price > (LastPrice) then Color.LIGHT_RED else  Color.GREEN);

(Example)

Plot defaulColor based on a value

Discussion in ThinkOrSwim

Plot defaulColor based on a value