Okay. Here is the history of every change I can think of on the Hot 100, dating back to the beginning of the 1992 Chart Year. This summary is long, but a lot has happened to the Hot 100 in the past 23 1/2 years.

Billboard actually first incorporated a small amount of streaming into the Hot 100 as early as 2007, but it was not until March 2012 that streaming played a significant role on the charts, with the debut of the On-Demand Streaming Chart. For a few weeks before video streaming was added, Billboard added "non On-Demand" audio streaming (I do not know the difference), but this only lasted a month or so before the videos started counting (with "Harlem Shake").

Billboard divided download sales by five through the 2007 Chart Year, then increased the divisor to 10 (I think we should go back to 8 myself, since we are almost back down to the levels at which downloads were divided by five). Downloads started fully counting on the Hot 100 in February 2005, and other major formats in October 2012, Dance early 2013, and Christian & Gospel at the start of the 2014 Chart Year. Billboard still has not done this for Jazz. The HDT Chart, since replaced by the HDS Chart, first appeared in mid to late 2003.

Streaming charts appeared for the first time in March 2012. Airplay only songs, along with broadening the HRS Chart to include all radio formats (except Latin) happened at the beginning of the 1999 Chart Year, and Latin was added in early 2000. Billboard went to point of sale and electronic monitoring of airplay for the chart dated 30 November 1991 (beginning of 1992 Chart Year).

The HRS Chart first appeared in 1990 (but was not used for Hot 100 purposes) and the HSS Chart appeared in April/May 1991, but was not used for the Hot 100 until November 1991, even though Billboard immediately started using Soundscan for ranking albums. This delay screwed Bryan Adams's "Everything I Do, I Do It For You", which spent 10 weeks at #1 on HRS, 17 weeks at #1 on HSS, and sold over 4.1 million copies, but only spent seven weeks at #1 on the Hot 100 due to the old formula, from ranking among the top songs of all time. Had Billboard changed the formula that spring, EIDIDIFY would have likely spent around 14 weeks, or twice as long as it's actual stay, at # 1 on the Hot 100. Adams's song had already fallen to between 65 & 70 on the Hot 100 the week before the formula change, despite the fact EIDIDIFY still ranked within the Top 20 on both the HRS and HSS Charts.

Ah, that explains why Lose Yourself placed rather poorly in the year-end charts. Its chart run was quite short AND it was divided between two years. Still pretty salty that Missy got blocked, but LY's proven itself through time by still selling well to this day, 12+ years after release.

Wow Brian, thank you so much, that was very useful, I appreciate it

And I hadn't paid attention to Lose Yourself's chart run, what a strange run actually considering how huge it is.. Uhmm

And what about Ringtones? Were they a factor for Hot 100 formula?

UGHH im over UF

I don't think they are, though I think they should be to strengthen the sales component. I would also add video download single sales and add physical single sales at one point per copy. Video downloads through I-Tunee aren't included either, but they should be.

So... what the hell was the formula before soundscan that made it so EIDIDIFY wasn't T20 even with T20 in both areas???

They relied on word of mouth playlists from radio stations, which often deleted songs they considered recurrent, and word of mouth sales reports from what was selling in stores, and the stores often stopped mentioning older songs still for sale. Billboard relied upon word of mouth.

This worked like the Dance Club Play Chart does today, which is why that chart is so screwed up -- just like the Hot 100 that had no way to confirm whether or not the stations and stores were telling the truth, Billboard has no way to verify what DJs are actually playing at clubs. The old method of tabulating the charts was very inaccurate, but the technology did not exist until 1990 to change this.

If you were to compare the Country Chart from 1989 that relied on playlists to the charts in 1990 using electronic tracking data to monitor the music played at Country stations, you would see a HUGE difference in how the songs moved. There were fewer Number Ones, hits by the biggest artists climbed much faster, and then fell more slowly. Labels who were used to having a new Number One song each week that would "get out of the way" for other songs by dropping out of the Top 10 from #1 did not like the changes for a while.

Oh wow... That's insane :O Thanks for your info, the charts seem crazy back then. So... could perhaps songs such as Hey Jude have actually been #1 for OSD lengths if SoundScan were implemented back then?

Quite possibly same for Physical too, as it was certified platinum. Night Fevef was also Platinum. You Light Up My Life and Bette Davis Eyes stopped at Gold I think, as did Every Breath You Take, which could have shortened their runs at #1. I can't remember if "Endless Love" went Platinum or just Gold. "Islands In The Stream" which was the last Country crossover to top the Hot 100 for 16.5 years, obviously benefitted some from the sales formula used, as it was the only single in 1983 certified Platinum (at that time and through the end of 1988 Platinum represented sales of 2 million singles, not one million), because the song stopped at #7 on Mediabase. However, it would have stayed longer on top had the point of sale technology been in place at that time it was a smash.

Almost none of the last 12 hours count toward its debut week.

Only sales before midnight Eastern time count toward the chart this week. I'm saying #12-15.

Same as it was going to without the performance. The tracking week ended shortly after the boost came into effect.

Sugar needs to dethrone UF tho.

Yes

maybe in airplay

Can someone please tell me how many points were needed to score a Top10 last week?

I mean.. I know BBHMM still has no chances this week. But its just to make myself an idea.

Its predicted to sell 140K + around 25M AI = 165 points

How many did the #10 song had last week?

The #10 song "GDFR" scored around 208 points (this is not official since the formula I use is not confirmed)

10. GDFR = 101k + 39M + 5.2M = 208

I'm guessing #15 this week, #9 next week.