Your inputs

Price data (oldest first)80 rows

One row per period: High, Low

101.17, 99.3
101.1, 98.99
101.45, 98.91
101.08, 99.78
101.03, 99
101.96, 99.52
101.78, 98.92
101.28, 99.22
102.09, 99.51
101.22, 98.86
100.56, 99.21
100.38, 98.23
99.66, 98.69
100.4, 99.14
100.12, 97.97
99.79, 97.62
100.76, 98.1
101.13, 98.78
99.8, 97.52
99.19, 96.87
99.81, 97.92
101.14, 98.36
101.63, 99.32
102.2, 100.3
102.6, 101.25
102.4, 100.57
103.6, 101.21
104.28, 102.16
103.97, 102.47
105.9, 102.68
106.27, 105.21
106.79, 105.43
105.97, 103.55
104.77, 102.93
104.89, 102.58
103.21, 101.11
101.69, 100.33
102.08, 101.49
102.2, 100.21
101.22, 99.5
100.97, 100.21
101.46, 97.89
99.66, 98.43
100.42, 98.39
101.81, 99.95
101.21, 99.73
100.15, 98.49
99.89, 98.24
98.71, 96.69
99, 97.07
99.98, 98.08
99.07, 97.46
99.2, 97.72
100.57, 98.37
101.88, 99.14
102.55, 101.15
103.06, 100.97
103.77, 100.94
104.3, 102.44
104.35, 102.71
103.69, 102.8
104.05, 102.67
104.94, 101.98
105.38, 104.05
105.72, 103.86
106.18, 104.64
106.33, 105.39
106.1, 104.83
107.11, 104.83
107.12, 105.45
108.87, 106.34
108.92, 107.38
109.48, 107.28
109.25, 107.41
108.16, 106.29
108.87, 106.69
108.87, 106.64
109.38, 107.12
110.21, 108.07
111.04, 109.31

Paste rows from a spreadsheet or CSV.

Acceleration step

Maximum AF

Results

Parabolic SAR106.51uptrend — SAR is the trailing stop below price

Trend flips13last 2 bars ago

Each bar the SAR moves towards price by the acceleration factor (starting at 0.02, rising by 0.02 on every new extreme up to 0.2). When price crosses the SAR the trend flips — which makes it a natural trailing stop.

Price (mid) with Parabolic SAR

Last 10 bars

Bar	High	Low	SAR	Trend
#80	111.04	109.31	106.51	up
#79	110.21	108.07	106.35	up
#78	109.38	107.12	106.29	up
#77	108.87	106.64	109.35	down
#76	108.87	106.69	109.42	down
#75	108.16	106.29	109.48	down
#74	109.25	107.41	106.81	up
#73	109.48	107.28	106.14	up
#72	108.92	107.38	105.45	up
#71	108.87	106.34	104.83	up

Not financial advice. Results are estimates based on the values you enter and simplified assumptions; real trades are affected by fees, slippage, gaps and other factors. Trading involves substantial risk of loss. Read the full disclaimer.

How to calculate Parabolic SAR

Uptrend: SAR_next = SAR + AF × (EP − SAR) (EP = highest high of the trend) Downtrend: SAR_next = SAR − AF × (SAR − EP) (EP = lowest low of the trend) AF starts at 0.02, rises 0.02 at each new EP, capped at 0.20

Paste prices oldest-first, one value or row per bar — straight from a spreadsheet or CSV export. Use “Sample data” to try it instantly.

Worked example

In an uptrend SAR = 98, EP = 105 and AF = 0.04.
Next SAR = 98 + 0.04 × (105 − 98) = 98.28.
If the low drops below the SAR, the trend flips and SAR jumps to the old EP.

How to interpret Parabolic SAR

Dots below price mean an uptrend, above price a downtrend. Because it always flips with price, SAR is a stop-and-reverse system: excellent in clean trends, expensive in ranges. Many traders only take SAR signals when ADX confirms a trend.

Technical Indicators

ADX Calculator

Calculate ADX, +DI and −DI with Wilder smoothing to measure trend strength and direction.

ADX(14) with +DI / −DI → trend strength

Technical Indicators

ATR Calculator

Calculate Average True Range and turn it into volatility-based stop-loss levels.

ATR(14) 2.0 · 2× from 100 → stop 96

Technical Indicators

EMA Calculator

Calculate an exponential moving average with the 2 ÷ (n + 1) multiplier, bar by bar.

80 closes · EMA 20 & 50

Parabolic SAR calculator FAQ

What do the acceleration settings do?

A larger step or maximum makes the SAR tighten faster — earlier exits, more whipsaws.

Can SAR be used as a trailing stop?

Yes — that's its main use. Move your stop to the SAR level each bar.

How to calculate Parabolic SAR

Worked example

How to interpret Parabolic SAR

Related calculators

ADX Calculator

ATR Calculator

EMA Calculator

Parabolic SAR calculator FAQ