I have different numbers for spi Low of 4700 was on 9/2/16 (sorry for being pedantic) and the R up to the 18/3/16 was to 5214 making the range 514. The high in March 18 came in on the 12/3 (6032 March, 6024 June) making that 530 Trade, 762 Cal making the R 1332 or 1324, always tricky trying to make sense of ranges around change of contract time.
The spi fell 338 points from the 12/3.
A much simpler use of time picked the high of 6136 on the 15/5.
Low 3722 8/9/11 to 4700 low 9/2/16 was 1143 TRADE + 50% TIME 572 TRADE GAVE 17/5/18 (one day out).
PRICE;
R up from 4700 to 5569 was 869 went down 540 (good number 50% of 1080 number of fusion) into Trump low.
Trump low 5029 to 6136 H = 1107
869 x 1.272 (Being sq root 1.618)= 1105.4, just off.
Also Crash LOW 3111 to 6136 = 3025 and 3024 is 144 x 16.
The problem with finding these ratios are that you (me anyway) normally find them too far after the event, though it can confirm that the TIME & PRICE has nailed a significant CIT. There are so many combination and permutations of the ratios etc, if you look hard and long enough you can pick a number out of the air and find a reason, though the one above was relatively straight fwd.
Possible targets for this move down for the spi, I am thinking 466/7 as this range and multiple of 233 (fib multiple) have occurred a few times since the 3722 Low in august 2011.
The best ratio using the 1.272 was calling the ATH of spi at 6880.
A high of 5407 came in nicely on time and price, it then fell 666 points.
The reciprocal 1/1.272 is .786. now if 5407 is .786 of where the spi was headed.
5407 x 1.272 =6878, 2 ticks off.
(20min delay)