set{hiop, high - open}

Here an array called "hiop" is literally "today's high minus today's low". Hence, the value you would see in the column named "hiop" would be their difference.

set{ t1, count( ema(5) 1 day ago above ema(5) 2 days ago, 1 ) }

This combines the count function within a set statement. Simply, an array called "t1" is created from the value derived from the count function. Count() is used to "count up" or measure how many times a given condition you specify occured within a specified time. works like a conditional statement that spits out 1 if the condition is true; otherwise 0.

As such, in the above count() you'll notice the condition "ema(5) 1 day ago above ema(5) 2 days ago" followed by 1 as the lookback parameter. This means "within the last 1 day, ema(5) 1 day ago is above ema(5) 2 days ago". If this condition happens to be TRUE, namely yesterday's ema(5) is indeed above ema(5) 2 days ago, then the value of 1 is assigned to "t1"

set{ t2, count( ema(5) 1 day ago above ema(5) , 1 ) }

Here again, if the condition stipulated within the count() is TRUE, then "t2" will spit out 1.

set{ top123, t1 * t2 }

Here ure multiplying the values from the above two set statements. If the conditions were TRUE for both sets, you would see a value of 1 for "top123" (1 x 1 = 1). But suppose only one of the two has a value is TRUE. In such a case, "top123" will spit out 0 (1 x 0 = 0).

set{ days_top , days(top123 equal 0,100) }

Here, the "days since" function is used to find when a given condition occured within the last x days. Unlike count(), that is used to measure how many time a given condition occured, days() is used to measure how many days ago a given condition occured.

In the above set statement, the condition is "top123 equal 0" and the parameter for the lookback is 100. So it literally means how many days ago, within the last 100 days, did this condition occureds?

set{ b1, count( ema(5) 1 day ago below ema(5) 2 days ago, 1 ) }

This means "how many times within the last 1 day did ema(5) 1 day ago (eg. yesterday's ema(5)) is below ema(5) 2 days ago?".

set{ b2, count( ema(5) 1 day ago below ema(5) , 1 ) }

Ditto.

set{ bot123, b1 * b2 }

Add up the values from "b1" and "b2".

set{ days_bot , days(bot123 equal 0,100) }

Within the last 100 days, when did "bot123 equaled 0"?

set{E5b,days(close is above ema(5),100)}

Within the last 100 days, when was "close is above ema(5)"?

set{E5a,days(close is below ema(5),100)}

Within the last 100 days, when was "close is below ema(5)"?

set{CxE5, E5a - E5b}

Subtract the value derived from e5b from the value derived from E5a