Coral Trend

A trend line smooth enough to be worth acting on when it finally changes colour. Coral Trend MTF runs a six stage exponential cascade of the T3 family and takes its signal from the colour of the finished line changing, which is one signal per real move rather than one per wobble. It draws a higher timeframe on any chart, reading closed senior bars only, and redraws on the timer so a quiet market still updates. It is free: no trial, no locked features, no upgrade page.

Six exponential averages are chained, and the outputs of the chain are recombined with weights built from a single constant. That is the T3 family construction, and its effect is a line with much less lag than six plain averages would have and much less noise than one fast average would.

The signal is the colour of the finished line changing, which happens when the line turns. Nothing crosses anything, so there is no second series to argue with. The ATR period in the settings scales how far an arrow is drawn from its bar and never touches the turn itself.

What is on the chart

Drawn in the price window: the coral line coloured by its direction and unbroken across the turn, and BUY and SELL arrows on the bar where the colour changed. This product has no channel, so the Styles tab offers the line, its width and the arrow size and nothing else.

The panel

A canvas panel on the price chart, draggable, collapsible, closeable. It shows the timeframe in force and the setting values actually being used. It says what the last closed bar was: a BUY signal, a SELL signal, or neither. And it says whether the numbers on screen came from the properties dialog or from the panel, and how many of them were changed by hand.

Below that sit the settings the panel can move, with their current values. The gear opens a three-tab sheet.

Values covers the timeframe, the smoothing period that sets the cascade length, twenty one by default, the constant that sets the cascade weighting, 0.4 as in the original, and the ATR period of fourteen, which scales the arrow offset only. Styles covers the palette, the line and its width, and the arrow size. Every Values row has steppers, a range and a sentence of help.

The Alerts tab covers the master switch, the per event switches, the channels, the cooldown in minutes and a test alert.

Three colour schemes: dark, light, and a colour-blind safe one that uses blue and orange rather than red and green. Everything about the panel, including every value changed on the sheet, is stored per chart and survives a timeframe change and a terminal restart. The interface is English.

Alerts

Off out of the box. Three events: a BUY signal, a SELL signal, and a touch of the coral line, which is the pull back event rather than a flip. Each has a switch of its own.

Channels: a popup window, a sound, a push to the mobile terminal and e-mail. There are per-event and per-channel switches, and a cooldown that defaults to two hours.

Alerts fire on the last closed bar. Two further alerts, off by default, speak on the forming bar within a chosen number of seconds of its close, and they are labelled early because a flip that exists mid-bar can un-happen. Telegram is not part of this product.

Signals on the forming bar

There is one switch that matters more than the others, and it is in the Values tab as well as in the inputs: whether buffers and arrows are allowed on the bar that is still forming.

With it on, which is the shipped default, you see a flip as soon as the market makes it. Sometimes that flip is undone before the bar closes and the arrow disappears. With it off, nothing is written on the forming bar at all: there is no repaint of any kind, and every signal arrives one bar late by construction.

Both behaviours are legitimate. The product does not pick for you and it does not hide which one it is doing: the panel and the setting name both say so.

Multi-timeframe

The Timeframe setting computes on a higher timeframe and draws the result here. Only closed senior bars are read: a chart bar shows the newest senior bar that had already closed by that chart bar's own close, so the flip lands on the bar that closes together with the senior bar, and nothing is drawn that could not have been known in real time.

The foreign series is built in the background. The first read of it can come back empty, the indicator retries, and the panel says whether it is waiting for a download or looking at a genuine shortage of history. It never fails initialisation over missing bars.

Reading it from an EA

Sixteen buffers, all readable through iCustom and CopyBuffer. Buffer 0, Buy, carries the arrow price on a BUY bar and EMPTY_VALUE otherwise, and is not drawn; buffer 1, Sell, is the same for a SELL. Buffers 2 to 5 belong to the two fills and are display plumbing, not for reading. Buffer 6 is the coral line while the trend is up and buffer 7 is the same line while it is down; on the turning bar both hold a value, which is what keeps the drawn line unbroken. Buffer 8 is a service series kept for the shared buffer map and buffer 9 is a second service series kept for the same reason. Buffers 10 and 11 are the drawn copies of buffers 0 and 1. Buffer 12, Signal, is +1 on a BUY bar, -1 on a SELL bar and 0 otherwise. Buffer 13 is Override, buffer 14 is the coral line as one unbroken series, and buffer 15 is the trend itself, 0 while up and 1 while down.

Buffers 0 and 1 are the contract: never painted, filled on every pass whatever the Styles tab says, and present in the Data Window. Hiding the arrows on the display cannot starve a strategy of the signal, because hiding is done by changing how a plot is drawn and never by emptying a buffer.

An instance created by iCustom is read only and always uses the parameters you passed. The Override buffer lets a strategy detect that a chart instance is running on numbers changed by hand from the panel.

Provenance

This is a port of the "Coral Trend Indicator" by LazyBear, an openly published TradingView script, which makes a port by formula admissible. The implementation is a reconstruction from the formulas. One deviation is declared: the cascade is seeded with the first price rather than with a zero, because a zero seed draws a spike out of nothing at the left edge; convergence is exponential and after the warm up the two agree.

The product is called Coral Trend MTF because that is the name of the method, not because authorship of the method is claimed here. The original work belongs to its author.

Honest limits

A six stage cascade turns late. That is what makes the line worth reading and it is also the entire cost of it, and no setting removes the trade off.

The constant changes the character of the line completely. A higher value makes it faster and noisier, a lower one slower and calmer, and neither of the two is the correct setting.

There is no volatility filter here. A colour change during a flat hour looks exactly like a colour change at the start of a move, and the product does not claim to tell them apart.

The settings move every signal the product will ever show. Two configurations produce two different sets of signals, and neither of them is the true one.

No profit figure, win rate or backtest result is claimed here.