StochasticFull w Regression Slope For ThinkOrSwim

[merryDay]

mod note:
A quick reminder for everyone:

» Bots get things wrong a lot — sometimes 40% or more.​

» Moderators do not test or validate the AI‑generated scripts posted to the forum.​

» This is not a reflection on @BillW, whose work is consistently excellent and well‑regarded in this community.​

About this specific script
The issue here is not the author, not the idea — it’s the math.

Bots hallucinate. Its a thing. ChatGPT hallucinated that a regression slope behaves like any other plotted line. It assumed you could compare two points on the slope like this:

slope > slope[1]

to determine whether a linear regression is “rising” or “falling.”

Obviously that is not true. The plot of the LRC comes from a complex set of arrays that results in a pretty line. But the math that created that line is not available to thinkscript. We have no access to the array math that creates the data points of an LRC plot.
It is not possible to use the slope of a linear regression line as part of our strategies ever.

I didn't review any other part of the bot's logic in this script. But the coloring of the array slope has been commented out in the original script:

# this does not work: Color logic: Spring Blue #4086FF = rising, Classic Rose #A70000 = falling
#RegSlope.AssignValueColor(if slope > slope[1] then CreateColor(64, 134, 255)
# else if slope < slope[1] then CreateColor(167, 0, 0) else Color.YELLOW);

 

[BillW]

I asked CoPilot to add a regressions slope for StochasticFull. Also included is RSI running across midline. It is color coded for 20 period and OB of 55 and OS of 45. Watch it w BollingerBands for a few days and see if you like it. Pretty simple setup.

# Stochastic Full w Regression Slope and RSI

declare lower;

plot ZeroLine = 50;
ZeroLine.SetDefaultColor(CreateColor(0, 0, 0));
ZeroLine.SetStyle(Curve.LONG_DASH);
ZeroLine.SetLineWeight(2);
ZeroLine.HideTitle();
ZeroLine.HideBubble();

#RSI Line



input RSI_Wilder_length = 20;
input RSI_Wilder_over_bought = 55;
input RSI_Wilder_over_sold = 45;
input RSI_Wilder_price_type = close;
def RSIplot = reference RSI(RSI_Wilder_length, RSI_Wilder_over_bought,
RSI_Wilder_over_sold,
RSI_Wilder_price_type);
plot RSI_line = 50;
RSI_line.SetDefaultColor(CreateColor(0, 0, 0));

RSI_line.SetLineWeight(2);
RSI_line.HideTitle();
RSI_line.HideBubble();
RSI_line.AssignValueColor(if RSIplot >= RSI_Wilder_over_bought then CreateColor(64, 134, 255) else if
RSIplot <=
RSI_Wilder_over_sold then CreateColor(150, 30, 0) else CreateColor(0, 0, 0));


input over_bought = 80;
input over_sold = 20;
input KPeriod = 10;
input DPeriod = 10;
input priceH = high;
input priceL = low;
input priceC = close;
input slowing_period = 3;
input averageType = AverageType.SIMPLE;


def lowest_k = Lowest(priceL, KPeriod);
def c1 = priceC - lowest_k;
def c2 = Highest(priceH, KPeriod) - lowest_k;
def FastK = if c2 != 0 then c1 / c2 * 100 else 0;

plot FullK = MovingAverage(averageType, FastK, slowing_period);
plot FullD = MovingAverage(averageType, FullK, DPeriod);
FullK.SetDefaultColor(CreateColor(255, 103, 20));
FullD.SetDefaultColor(CreateColor(145, 145, 66));

plot OverBought = over_bought;
plot OverSold = over_sold;
OverBought.Hide();
OverSold.Hide();
plot line = 80;
plot line1 = 20;
line.SetDefaultColor(CreateColor(44, 44, 44));
line1.SetDefaultColor(CreateColor(44, 44, 44));


AddCloud(100,   line,  CreateColor (38, 38, 38));
AddCloud(line1, 0, CreateColor (38, 38, 38));

def upK = FullK crosses above OverSold;
def upD = FullD crosses above OverSold;
def downK = FullK crosses below OverBought;
def downD = FullD crosses below OverBought;


FullK.SetDefaultColor(GetColor(5));
FullD.SetDefaultColor(GetColor(0));
OverBought.SetDefaultColor(CreateColor(0, 0, 0));
OverSold.SetDefaultColor(CreateColor(0, 0, 0));

FullK.HideBubble();
FullK.HideTitle();
FullD.HideBubble();
FullD.HideTitle();
OverBought.HideBubble();
OverBought.HideTitle();
OverSold.HideBubble();
OverSold.HideTitle();
line.HideTitle();
line.hidebubble();
line1.HideTitle();
line1.hidebubble();

# ---------------------------------------------------------
# 📉 Regression Slope of FullK From MS CoPilot
# ---------------------------------------------------------

input slopeLength = 10;

# Linear regression slope of FullK
def slope = Inertia(FullK, slopeLength);

plot RegSlope = slope;
#RegSlope.SetLineWeight(2);
RegSlope.SetDefaultColor(CreateColor(64, 134, 255));

# this does not work: Color logic: Spring Blue #4086FF = rising, Classic Rose #A70000 = falling
#RegSlope.AssignValueColor(if slope > slope[1] then CreateColor(64, 134, 255)
#    else if slope < slope[1] then CreateColor(167, 0, 0)  else Color.YELLOW);

RegSlope.HideBubble();
RegSlope.HideTitle();

Here is full chart: https://tos.mx/!JVpTmPZa