# Lucid SAR

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I wrote this script after having listened to Hyperwave with Sawcruhteez and Tyler Jenks of Lucid Investments Strategies LLC on July 3, 2019. They felt that the existing built-in Parabolic SAR indicator was not doing its calculations properly, and they hoped that someone might help them correct this. So I tried my hand at it, learning Pine Script as I went. I worked on it through the early morning hours and finished it by 4 am on July 4, 2019. I've added a few bits of code since, adding the rule regarding the SAR not advancing beyond the high (low) of the prior two candles during an uptrend (downtrend), but the core script is as it was.

This code is open source under the MIT license. If you have any improvements or corrections to suggest, please send me a pull request via the github repository https://github.com/casey-bowman/sar

For more details on the initial script, see https://www.tradingview.com/script/KU6P5...

Sawcruhteez from Lucid Investment Strategies wrote the following description of the Parabolic SAR , where the quotes are from Section II of J. Welles Wilder, Jr.'s book New Concepts in Technical Trading Systems (1978)

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Parabolic SAR

"The Parabolic Time / Price System derives its name from the fact that when charted, the
pattern formed by the stops resembles a parabola, or if you will, a French Curve. The system
allows room for the market to react for the first few days after a trade is initiated and then the
stop begins to move up more rapidly. The stop is not only a function of price but also a function
of time
.

"The stop never backs up. It moves an incremental amount each day, only in the direction which

"The stop is also a function of price because the distance the stop moves up is relative to the
favorable distance the price has moved... specifically, the most favorable price reached since the

A. The calculation for a bullish Parabolic SAR is:

Tomorrow’s SAR = Today’s SAR + AF (EP - Today’s SAR )

"Acceleration Factor ( AF ) is one of a progression of numbers beginning at 0.02 and ending at
0.20. The AF is increased by 0.02 each period that a new high is made" (if long) or new low is

EP is the "Extreme Price Point for the trade made so far. If Long, EP is the extreme high price for
the trade; if Short, EP is the extreme low price for the trade.”

Most websites will provide the above calculation for the Parabolic SAR but almost all of them
leave out this crucial detail:

B. "Never move the SAR into the previous day’s range or today’s range

"1. If Long, never move the SAR for tomorrow above the previous day’s low or
today’s low
. If the SAR is calculated to be above the previous day’s low or
today’s low, then use the lower low between today and the previous day as
the new SAR . Make the next days calculations based upon this SAR .

"2. If Short, never move the SAR for tomorrow below the previous day’s high or
today’s high
. If the SAR is calculated to be below the previous days’ high or
today’s high, then use the higher high between today and the previous day
as the new SAR . Make the next days calculations based upon this SAR ."

When a Bullish SAR is broken then it gets placed at the SIP (significant point) of the prior trend.
In otherwords it is placed above the current candle and at the price that was the SIP.

The inverse is true for the first Bullish SAR .

"This system is a true reversal system; that is, every stop point is also a reverse point." If breaking
through a bearish SAR (one above price) that simultaneously signals to close a short and go
long.
Hi,
Please set this up so there is an up color and a down color ex. green for up and red for down but leave it customizable I like cyan and magenta personnally

Great script

greenticks
@greenticks, That's a great idea. Thank you! Also there are people who are color blind. I am a bit so myself, which is why green and red don't always work for me for up and down candles. You see I use blue and red in the chart above. After my vacation, I plan to add this feature, along perhaps with the expected stop for the next candle, which I've used privately so far. First in line is your suggestion.

Yesterday I felt honored to see @ToneVays add the Lucid SAR indicator to his chart during his show "Trading Bitcoin", after having learned so much from him

Thank you!!

For those following bitcoin, the weekly SAR for BTC/USD on Bitstamp has reversed trend this morning

Great Work - Thank you for clarifying this crucial difference and sharing it - Much Appreciated

SWT
@SWT, You're welcome

stinkbug
@stinkbug, hi this is the Fidelity #s layered on top of the Lucid and SAR provided by TV.

stinkbug
@stinkbug, Thanks! Could you list for me the low of the downtrend to the left and the progressive highs of the uptrend to the right (these would be the highs of the 1st, 2nd, and 4th candles of the uptrend), along with the values of the SARs for both the Lucid and Fidelity indicators for all of the uptrend and the last bit of downtrend on the very last two candles on the right, along with the lows for those two candles. I'll be able to do the hand calculation and see where the difference may lie.