The Gap Stat calculator

Is it possible to predict gaps in advance? I’ve been working on this question for a while. Although there are many gap filters on Stockfetcher, none of them are useful in my opinion. What I want to know is how the stock I’m currently holding performs historically on gaps or how the stock I’m looking to buy into the close performs under a given set of conditions. Well thanks to my friend SlowPoke I now have a Gap Stat calculator. This filter is used as a calculator to check an individual stock's performance rather than scanning for stocks that meet the criteria. To use it just put in the stock symbol that you are interested in and the percent gain and loss for performance in the first and second lines of code.
Here is the code using RDN and 10% gain/loss as an example:

symlist (rdn)

set {gain_threshold, 0.10}  /* 20% gain */

set {drop_threshold, 0.10}  /* 20% drop */

set {ClOp , close  - open}

set {ClOpPct , ClOp / open}

set {OpCl , open - close}

set {OpClPct , OpCl / close}

set {met_threshold_Yesterday , count(ClOpPct 1 day ago >= gain_threshold,1)}

set {met_down_threshold_Yesterday , count(OpClPct 1 day ago >= drop_threshold,1)}

set {gapped_up_today , count(open > close 1 day ago,1)}

set {gapped_down_today , count(open is below close 1 day ago,1)}

set {met_threshold_then_gapped_up_today , met_threshold_yesterday * gapped_up_today}

set {met_threshold_then_gapped_down_today , met_threshold_yesterday * gapped_down_today}

set {met_down_threshold_then_gapped_up_today , met_down_threshold_yesterday * gapped_up_today}

set {met_down_threshold_then_gapped_down_today , met_down_threshold_yesterday * gapped_down_today}

set {met_threshold ,count(met_threshold_yesterday >= 1,100)}

set {then_gapped_up , count(met_threshold_then_gapped_up_today >= 1,100)}

set {then_gapped_down , count(met_threshold_then_gapped_down_today >= 1,100)}

add column met_threshold

add column then_gapped_up

add column then_gapped_down

set {met_down_threshold , count(met_down_threshold_yesterday >= 1,100)}

set {down_then_gapped_up , count(met_down_threshold_then_gapped_up_today >= 1,100)}

set {down_then_gapped_down , count(met_down_threshold_then_gapped_down_today >= 1,100)}

add column met_down_threshold

add column down_then_gapped_up

add column down_then_gapped_down

chart-time 105 day

draw met_threshold_yesterday

draw met_down_threshold_yesterday

We can see from these results that RDN gapped up 8 out of 10 times it gained 10% in the past 100 days. Interestingly, it lost 10% 23 times and still gapped up 17 times and only gapped down 5 times on a 10% loss. RDN is a gap upper. On the other hand a stock like DAL is much less reliable. In the past 100 days it has gained 10% 6 times and only gapped up 2 of those times and gapped down 4. Hopefully you will find this filter as useful as I do in your end of market decision making.

**UPDATE

This has been the source of some technical difficulties. If you cannot successfully cut and paste this into StockFetcher then email me at johnnyvento@gmail.com