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I want tradingview indicator Gaussian Filter [BigBeluga] convert into mq4
I had also attached coding in text file
coding is as under
//@version=5
indicator("Gaussian Filter [BigBeluga]", overlay = true, max_labels_count = 500)
// ＩＮＰＵＴＳ ========================================================================================================{
// Gaussian Filter Inputs
group1 = "Gaussian Filter"
//@variable Length of the Gaussian filter
int length = input(50, "Length", group = group1)
//@variable Sigma value for Gaussian filter smoothing
int sigma = input(10, "Sigma", group = group1, tooltip = "Sigma defines the amount of smoothing")
// Additional Features Inputs
group2 = "Additional Features"
//@variable Toggle for displaying levels
bool levels = input(true, "Show Levels", inline = "1", group = group2)
//@variable Toggle for coloring candles
bool candles_c = input(false, "Candles Color", group = group2)
// Color Inputs
group3 = "Colors"
//@variable Color for uptrend
color colUp = input(#18e7a2, "Up Trend Color", group = group3)
//@variable Color for downtrend
color colDn = input(#fc7c13, "Down Trend Color", group = group3)
//@variable Color for trend change
color change_col = color.gray
// Variables for tracking trend and price
var trend = bool(na) // Current trend direction (up or down)
var price = float(na) // Last price level for labeling
var value = array.new<float>() // Array to store filter values
// Variables for labeling and plotting
var point = float(na) // Current point for level plotting
var index_dn = 0 // Index for downtrend labels
var index_up = 0 // Index for uptrend labels
var color = color(na) // Current trend color
var color_level = color(na)
label lbl = label(na)
var percent_change = 0.
// Define a type for the Gaussian Filter parameters
//@type Defines the structure for Gaussian Filter parameters
type GaussianFilterParams
int length
int sigma
// Create an instance of GaussianFilterParams
GaussianFilterParams filterParams = GaussianFilterParams.new(length, sigma)
// }
// ＣＡＬＣＵＬＡＴＩＯＮＳ ============================================================================================{
// ATR (Average True Range) for level calculation
float atr = ta.atr(200)
//@function Draws a label on the chart with the specified text, color, index, and price.
//@param txt_ (string) The text to display.
//@param color_ (color) Color of the text.
//@param index_ (int) Index position for the label.
//@param value_ (float) The value used for positioning the label.
//@param price_ (float) Price level to display.
//@param size (size) Size of the label, default is size.normal.
//@returns (label) The label.
method draw_label(string txt_, color_, index_, value_, price_, size = size.normal)=>
label.new(chart.point.from_index(index_, value_),
text = txt_ + "\n" + price_,
style = label.style_label_left,
color = color(na),
textcolor = color_,
size = size,
tooltip = "Trend " + txt_ + " Level",
force_overlay = true)
//@function GaussianFilter is used for smoothing, reducing noise, and computing derivatives of data.
//@param src (float) The source data (e.g., close price) to be smoothed.
//@param params (GaussianFilterParams) Gaussian filter parameters that include length and sigma.
//@returns (float) The smoothed value from the Gaussian filter.
gaussian_filter(float src, params) =>
var float[] weights = array.new_float(params.length) // Array to store Gaussian weights
total = 0.0
pi = math.pi
for i = 0 to params.length - 1
weight = math.exp(-0.5 * math.pow((i - params.length / 2) / params.sigma, 2.0))
/ math.sqrt(params.sigma * 2.0 * pi)
weights.set(i, weight)
total := total + weight
for i = 0 to params.length - 1
weights.set(i, weights.get(i) / total)
sum = 0.0
for i = 0 to params.length - 1
sum := sum + src[i] * weights.get(i)
sum
// Calculate the smoothed Gaussian value
smoothed = gaussian_filter(close, filterParams)
// Detect trend changes based on crossover conditions
condition_up = ta.rising(smoothed, 4)
condition_dn = ta.falling(smoothed, 4)
// Set the trend direction and color based on the detected conditions
switch
condition_up => trend := true, color := colUp
condition_dn => trend := false, color := colDn
// }
// ＰＬＯＴ============================================================================================================{
// Determine the candle color based on trend change if enabled
col_trend_ch = (hl2 > smoothed and not trend ? change_col : hl2 < smoothed and trend ? change_col : color)
// Plot the Gaussian Filter line
// Gaussian Filter line
p1 = plot(
series = smoothed,
color = col_trend_ch,
title = "Gaussian Filter",
linewidth = 1
)
// Plot the price line (hidden by default)
// Hidden price line
p2 = plot(
series = ta.sma(hl2, 5),
title = "Price",
display = display.none,
editable = false
)
// Fill the area between the Gaussian Filter and price lines
// Fills the area between the Gaussian Filter and price lines
fill(p1, p2, ta.sma(hl2, 5), smoothed, na, color.new(col_trend_ch, 95))
fill(p1, p2, ta.sma(hl2, 5), smoothed, na, color.new(col_trend_ch, 95))
// Enter/Exit labels
if levels
//@check Checks for trend change and plots "Enter" or "Exit" labels
if condition_up and ta.change(trend)
point := smoothed - atr
price := math.round(close, 2)
color_level := colUp
if not na(point)
"Exit".draw_label(color.new(colDn, 40), index_dn, point[1],
str.tostring(price) + "\n" + str.tostring(percent_change, format.percent), size.small)
if condition_dn and ta.change(trend)
point := smoothed + atr
price := math.round(close, 2)
color_level := colDn
if not na(point)
"Enter".draw_label(color.new(colUp, 40), index_up, point[1],
str.tostring(price) + "\n" + str.tostring(percent_change, format.percent), size.small)
// Delete previous labels when trend changes
if not trend and not na(point)
lbl := na
index_dn := bar_index
lbl := "Exit".draw_label(colDn, index_dn, point, str.tostring(percent_change, format.percent))
label.delete(lbl[1])
if trend and not na(point)
index_up := bar_index
lbl := na
lbl := "Enter".draw_label(colUp, index_up, point, str.tostring(percent_change, format.percent))
label.delete(lbl[1])
percent_change := (close/price-1) * 100
// Signals
// Plot markers on the chart for trend change signals
plotchar(condition_up and ta.change(trend) ? smoothed : na, "Filter Up", "⦿",
location = location.absolute,
size = size.tiny,
color = colUp,
force_overlay = true)
plotchar(condition_dn and ta.change(trend) ? smoothed : na, "Filter Dn", "⦿",
location = location.absolute,
size = size.tiny,
color = colDn,
force_overlay = true)
// Enter and Exit Levels
plot(levels ? (ta.change(point) or na(point) ? na : point) : na,
style = plot.style_linebr,
color = bar_index % 3 == 0 ? color_level : na,
linewidth = 1,
editable = false)
// Color Candles
coolor_candles = candles_c ? col_trend_ch : color(na)
plotcandle(open, high, low, close,
color = coolor_candles,
wickcolor = coolor_candles,
bordercolor = coolor_candles,
editable = false)
// }