EMA + Supertrend

A clean trend overlay that combines five EMAs (9/21/50/100/200) with a color-switched Supertrend and simple BUY/SELL labels from the EMA-9 × EMA-21 crossover. It’s built to show structure (EMAs), direction (Supertrend), and timing (crossovers) without clutter.

Features

• EMAs 9, 21, 50, 100, 200 for short-to-long trend structure and dynamic support/resistance.
• Supertrend line, green in uptrends and red in downtrends.

Signals:

• BUY when EMA-9 crosses above EMA-21 (blue label below the bar).
• SELL when EMA-9 crosses below EMA-21 (yellow label above the bar).
• Lightweight overlay on the main chart pane.

Inputs

• Source: price series used for calculations (default: Close).
• EMA lengths: 9, 21, 50, 100, 200.
• ATR Length (Supertrend): default 10.
• Factor (Supertrend): default 4.0 (higher = fewer flips).
• ATR MA type: RMA, SMA, EMA, or WMA (default: RMA).

How it works

• EMAs are standard exponential moving averages on the selected source.
• Supertrend uses ATR(ATR Length) × Factor; direction sets color (green up, red down).
• Signals fire on bar close when:
• BUY: EMA-9 current > EMA-21 current and EMA-9 previous ≤ EMA-21 previous.
• SELL: EMA-9 current < EMA-21 current and EMA-9 previous ≥ EMA-21 previous.
• Warm-up: EMAs and Supertrend need a few bars before everything displays.

How to use

• Read the EMA “fan” for overall bias; wider separation usually means stronger trend.
• Favor trades in Supertrend direction (green for long bias, red for short bias).
• Treat BUY/SELL labels as timing cues; confirm with price action or higher-timeframe context.
• Manage risk normally (position sizing, stops, and invalidation levels).

Tuning tips

• Seeing chop or frequent flips? Increase Factor (e.g., 4 → 5–6) and/or ATR Length (e.g., 10 → 14).
• Directional filter: act on BUYs mainly when above EMA-200 and Supertrend is green; SELLs mainly when below EMA-200 and Supertrend is red.
• Multi-timeframe check: align entries on lower timeframes with higher-timeframe trend.

Notes

• Price-scale label visibility depends on platform settings/build; if a hide option doesn’t remove them, that’s platform behavior, not the script logic.
• On very short histories or illiquid symbols, expect a brief initialization period before lines and signals appear.

Changelog

• v1.0 — Initial public release: 5× EMAs, color-switched Supertrend, EMA-9 × EMA-21 BUY/SELL labels.