Intraday AFL System

Architecture: Seven Helper Functions

This AFL is architected as a function library — seven reusable helper functions (HAI_F1 through HAI_F7) that each handle a specific market condition check. This modular design makes it easy to combine conditions and customize your entry/exit rules.

Function	Description	Returns
`HAI_F1(no)`	HHV/LLV trailing channel — dynamic S/R level	Price level (tsl)
`HAI_F2(no)`	Cross of Close above the HAI_F1 channel	Buy signal (0/1)
`HAI_F3(no)`	Cross of Close below the HAI_F1 channel	Sell signal (0/1)
`HAI_F4(no)`	AMA2-based dynamic S/R state — is price above/below dynamic level?	State (0 or 1)
`HAI_F5(no)`	Detects if AMA2 state is unchanged (sideways confirmation)	Boolean
`HAI_F6(p,n,s,m)`	Bullish directional filter: PDI > MDI AND MACD > Signal	Boolean
`HAI_F7(p,n,s,m)`	Bearish directional filter: MDI > PDI AND Signal > MACD	Boolean

How the Signals are Generated

The AFL combines outputs from multiple functions to build high-confidence signals:

🟢

Buy Condition

HAI_F2 (HHV breakout) triggers AND HAI_F6 confirms bullish direction (PDI > MDI AND MACD > Signal). Both conditions must be true simultaneously.

🔴

Sell Condition

HAI_F3 (LLV breakdown) triggers AND HAI_F7 confirms bearish direction (MDI > PDI AND Signal > MACD). Confluence of breakout + momentum.

IntradayAFL.afl — HAI_F4 Dynamic S/R

function HAI_F4(no)
{
    prev = AMA2(C, 1, 0);
    // Dynamic S/R: switches between 20-bar H and L
    d = IIf(C > Ref(Max(Max(H, Ref(H,-20)), Max(Ref(H,-10), Ref(H,-15))), -1),
           Min(Min(L, Ref(L,-20)), Min(Ref(L,-10), Ref(L,-15))),
        IIf(C < Ref(Min(...), -1), Max(...), PREV));

    a = Cross(Close, d);
    b = Cross(d, Close);
    return(IIf(BarsSince(a) < BarsSince(b), 1, 0));
}

Technical Specifications

HHV/LLV Period

22 bars

MACD Fast

Configurable

PDI/MDI Period

Configurable

AMA2 S/R Lookback

10, 15, 20 bars

Sections

2 (Intraday + Swing)

Explorer Support

Yes

Installation & Setup

Download & Copy

Save IntradayAFL.afl to your AmiBroker Formulas\Custom folder.

Set Timeframe

Apply on a 5-minute chart for aggressive intraday entries, or 15-minute for less noise. Ensure live data is connected via AmiFeeder or Amidata.

Apply to Chart

Insert → Indicators → find Intraday AFL. The system draws the trailing S/R staircase line and plots arrows at signal points.

Use Explorer for Scanning

For scanning multiple NSE stocks simultaneously, run in AmiBroker Explorer. Filter column will mark stocks with active buy/sell conditions.

⚠️

The Intraday AFL uses multiple simultaneous filters — in a strong trending market, you may miss some early entries. Consider loosening the MACD confirmation filter (HAI_F6/F7) if you want earlier entries at the cost of more false signals.

💡

Recommended workflow: Use HAI_F1/F2/F3 for the primary signal, and HAI_F6/F7 as a final gate. This gives you 2-condition confluence — similar to a trend + momentum confirmation approach used in professional intraday systems.