DMI — Directional Movement Index

DMI

Directional Movement Index (DMI) is a technical indicator for evaluating trend direction and strength, widely used in financial markets.

DMI helps identify trends and their strength, allowing traders to adjust their strategies according to prevailing market conditions.

The crossings of +DI and -DI lines can serve as signals for entry and exit and provide traders with the opportunity to profit from market trend changes.

While DMI has its advantages, it is critical to consider that it is a lagging indicator that can give false signals, and traders need to use additional tools to confirm signals and choose market entry timing.

1. Indicator Essence

The Directional Movement Index helps visualize the struggle between buyers and sellers.

• +DI (Bulls' Line): Shows the strength of upward movement.
• -DI (Bears' Line): Shows the strength of downward movement.
• Crossing point: The moment when initiative passes from one side to the other.

2. Configuration Parameters in IIN

When using DMI on the platform, main parameters:

• Timeframe: Recommended from 1h and above to filter market noise.
• Length: Standardly 14 is used, but for volatile assets, it can be increased.
• Trigger Action: Selected as CROSS_UP (for long) or CROSS_DOWN (for short) depending on which line crosses the other.
• Indicator mode: Cross_only (buy only when the indicator triggers), Trend_Filter (acts as a filter for interaction with other indicators), Trend_for_buy (acts as a mechanism where new trades are opened immediately after closing; this function combines Trend_Filter and Cross_only).

3. Working in Combination (Confirmation System)

• DMI Role: Determining the exact entry moment (timing).
• Trend Confirmation: Use EMA 200 to trade only in the direction of the global trend.
• Volatility Boundaries: Combine the signal with Bollinger Bands to avoid buying at the movement peak.

The crossing of +DI and -DI is rarely used as a standalone source of signals and requires additional analysis.

• DMI Role: Use line crossings to determine the exact entry moment (timing).
• Trend Confirmation: Use EMA (e.g., EMA 50 or 200) to filter the global direction and not trade against the main market 'engine'.
• Extreme Zones: Combine the crossing signal with Bollinger Bands boundaries to see if the price is too 'expensive' or 'cheap' relative to the norm at the moment of the signal.

Advantages and Disadvantages

To create a professional trading system on the IIN platform, the DMI indicator (via +DI and -DI crossing) is best used as a 'trigger' confirmed by other tools.

Below is a detailed scheme of DMI combinations with popular indicators to form a 'system of three confirmations'.

DMI Combinations with Other Indicators

1. DMI + Bollinger Bands (BB)

• Logic: DI crossing gives a signal to start momentum, and BB limits it with a dynamic channel.
• Long Signal: +DI crosses -DI from bottom to top when price is at the lower or middle Bollinger line.
• Protection: If crossing occurred when price already broke the upper Bollinger band, the asset is overbought; entry is risky.

2. DMI + Stochastic / RSI

• Stochastic: Enter Long if DI lines crossed and Stochastic is in the oversold zone.
• RSI: If +DI crosses -DI upwards and RSI exits the 30 zone upwards, it's a strong bullish signal.

3. DMI + EMA / Cross EMA

• Trend Filter: If price is above EMA 200, consider only long signals (+DI over -DI).
• Cross EMA (9 and 21): Coincidence of moving average crossings and DI lines gives a powerful signal of local trend change.

Summary Table of Roles in IIN Strategy