Overlay one study onto another for crossover signals

Prepare yourself for "disillusionment" (you can google that if it's a new word for you)

In order to demostrate that those crossover points are an optical illusion I have recorded a very brief video. The video contains no audio and only lasts 43 seconds. The screenshots above show how to set this up so you can follow along.

One of things you want to notice in the video is that the drawing object cannot be added to the lower subgraph. This should be one of the clues that something is terribly wrong. As the video begins, take note of each crossover point. Then watch those crossover points move.

Link to video: https://drive.google.com/open?id=1uZrH6VmhCp5Fko1Ey6wPCmYt8R8J-4mp
MuzUtE=rES7e

If you create a custom chart study that computes the simple moving average directly from the RSI instead of the price graph data you will find it produces reliable crossover points that actually exist and indeed can be use to generate signals and alerts.

Here is some code that you can actually use. The exact opposite of an "overlay":

declare lower;
#---------- RSI Inputs
input rsiLength = 14;
input over_Bought = 70;
input over_Sold = 30;
input rsiPrice = close;
input rsiAverageType = AverageType.WILDERS;
def netChangeAverage = MovingAverage(rsiAverageType, rsiPrice - rsiPrice[1], rsiLength);
def totalChangeAverage = MovingAverage(rsiAverageType, AbsValue(rsiPrice - rsiPrice[1]), rsiLength);
def changeRatio = if totalChangeAverage != 0 then netChangeAverage / totalChangeAverage else 0;
#---------- Moving Average Inputs
input maLengthOne = 21;
input maTypeOne = AverageType.EXPONENTIAL;
#---------- RSI Section
plot rsi = 50 * (changeRatio + 1);
plot OverSold = over_Sold;
plot OverBought = over_Bought;
#---------- Moving Average Section
plot maOne = MovingAverage(maTypeOne, rsi, maLengthOne);

Place this on a chart below the overlay version shown in the screenshots above and try it out for yourself just as I show in the video. This one is real, the overlay does not even exist in space and time.