4H Synced Direction Divergence Alert US100 US500 US30

Overview

This script monitors three index symbols on a 4-hour (4H) basis and triggers an alert only when their last completed 4H candles are time-synchronized and their directions diverge (i.e., not all close in the same direction).

What it does

Compares the 4H candle direction (UP / DOWN / FLAT) across:

US100 (reference clock)

US500

US30

Sends an alert on the confirmed close of the 4H candle (not mid-candle).

Includes a detailed alert message showing:

the 4H close time

direction for each symbol

open, close, and the close-open delta

How it works (high level)

Reference clock (sync anchor):
The script uses Symbol 1 as the timing reference for 4H candle boundaries.

Strict bar synchronization:
It validates that all three symbols share the same 4H time_close before comparing directions.
If any symbol is missing that specific 4H bar (gap) or doesn’t align to the same close timestamp, no alert is triggered.

No repaint / no lookahead:
Data is requested without looking ahead, so the comparison is based on completed candles only.

Duplicate protection:
The script remembers the last fired 4H close time and prevents repeated alerts caused by recalculation.

How to use

Add the script to a clean chart.

Set your preferred symbols in the inputs (default: US100 / US500 / US30).

Create an alert:

Condition: select this script

Choose “Any alert() function call” (required, because the script uses alert() for detailed messages)

When a synchronized 4H close occurs and directions diverge, you will receive a detailed notification.

Inputs

Comparison TF: default 240 (4H)

Symbol 1 (Reference clock): default CAPITALCOM:US100

Symbol 2: default CAPITALCOM:US500

Symbol 3: default CAPITALCOM:US30

Timezone for alert message: controls only the displayed timestamp in the alert text

Notes / limitations

This script is designed for cross-symbol candle comparison, so alignment matters. If your symbols have different trading sessions, gaps, or data availability, the script may intentionally skip alerts when candles are not perfectly synchronized.

The script is an informational alert tool and is not a trading signal by itself. Always confirm context, liquidity, and market conditions.