Andrews Pitchfork: How to Draw and Read the Channel
Andrews Pitchfork is a charting tool built from three chosen pivot points that produces a median line plus two parallel outer lines, called tines, forming a channel around a trend. The idea is that price spends most of its time returning to the median line and reacts at the outer tines.
It is a trend-following and mean-reversion tool in one drawing. It is also completely dependent on which three pivots you select, which is the single most important thing to understand before using it.
How the pitchfork is constructed
The geometry is exact once you have your three points, labelled P0, P1 and P2 in order of time.
- Pick P0, a significant swing pivot that starts the move. In an uptrend this is a major low.
- Pick P1 and P2, the next major high and the next major low that follow it.
- Find the midpoint between P1 and P2.
- Draw a line from P0 through that midpoint and extend it forward. That is the median line.
- Draw two lines parallel to the median line, one starting at P1 and one starting at P2. Those are the upper and lower tines.
Illustrative Nifty 50 numbers, not current levels. P0 is a low at 22,800, P1 a high at 24,200 and P2 a low at 23,400, so the P1 to P2 midpoint is 23,800. The median line runs from 22,800 through 23,800 and continues at that slope, with the tines parallel to it from 24,200 and 23,400. Channel width is fixed at the 800 point P1 to P2 distance.
Reading the median line
The central claim, attributed to Alan Andrews, is that price returns to the median line a large share of the time. That gives three practical readings.
- Price holding above the median line in an up-sloping pitchfork is read as the trend staying intact.
- Price at an outer tine is stretched relative to the median, so traders watch for a reaction rather than assuming continuation.
- Price failing to reach the median line on a pullback, or slicing through it, is read as the trend losing rhythm.
What the slope tells you
Median line slope is the average pace of the move from P0 through the P1 to P2 midpoint. A steep line on a Bank Nifty pitchfork means a fast trend, and fast trends are harder to sustain. A shallow slope means a grind that tends to last longer.
The pivot selection problem
Here is the honest weakness. Move P0 back by one swing, or choose the second-highest high instead of the highest as P1, and both the slope and the width of the pitchfork change. The tool does not tell you which pivots are correct.
| Choice | Effect on the drawing | Practical consequence |
|---|---|---|
| Earlier P0 | Shallower median line | Trend looks stronger |
| Later P0 | Steeper median line | Trend looks weaker, breaks sooner |
| Wider P1 to P2 gap | Wider channel | Rare signals, wide stops |
| Narrower P1 to P2 gap | Narrower channel | Constant exits, more false signals |
Two disciplines reduce the damage. Use only pivots that are obvious without zooming, and set the pitchfork once at the start of a move rather than redrawing it whenever price misbehaves. Redrawing to fit recent price is curve fitting.
When it works and when it fails
The pitchfork works reasonably in steady trends with regular pullbacks, which is where the median line means something. Liquid instruments help, since broad participation sets the pivots rather than a few large orders.
It fails in three situations. In a sideways market the median line has no slope worth trading and price crosses it constantly. After a gap, common around results or an RBI policy decision, price can jump outside the channel and leave the drawing stale. In a parabolic move price runs above the upper tine for weeks, so the tool keeps flagging a stretch that never resolves.
The specific risk is false precision. The lines look mathematical, but the inputs are judgment calls. A stop just outside a tine sits at a level that would move if you had clicked a different pivot, so decide your risk in rupees first and check the tine placement fits it.
Frequently Asked Questions
Which three points should I pick for a downtrend?
Mirror the uptrend method. P0 is a major high, P1 is the next major low and P2 is the next major high, and the median line then slopes down. The construction steps are otherwise identical.
Do I need to redraw the pitchfork as the trend develops?
Only when a genuinely new structural pivot forms, such as a higher low that clearly exceeds the old channel. Frequent redrawing to keep price inside the lines defeats the purpose of the tool.
Can I combine a pitchfork with indicators?
Yes, and it usually helps. A test of the upper tine alongside a momentum reading that is already extreme is a stronger observation than either alone, because the two use different inputs.
Does it work on intraday charts?
It can, on liquid index futures where 15-minute swings are meaningful. On short timeframes pivots form and vanish quickly, so the sensitivity problem gets worse, not better.
Key Takeaways
- The pitchfork uses three pivots to build a median line from P0 through the P1 to P2 midpoint, plus two parallel tines.
- The core reading is mean reversion to the median line, with reactions expected at the tines.
- Median line slope is a rough measure of trend pace, and steeper is usually less sustainable.
- The whole drawing shifts with your pivot choices, so fix them early and resist redrawing.
- Gaps and sideways markets make the tool unreliable, and all levels used here are illustrative.
