Can Prior SMA Crossover Price Levels be Stored?

April 23rd, 2013, 01:57 PM

Hello all,

I was thinking about trying my hand at Ninjascript programming to do a simple setups. I wanted to know if there's a way for Ninjatrader to store the particular price level of an SMA associated with an SMA crossover for comparison to a prior identical crossovers that occurred earlier.
For instance, if a 6-period SMA crosses above the 18-period SMA at the close of the current bar Ninjascript (as per instructions) would record the closing price level of the 18-period SMA the crossover occurred on... but the Ninjascript would also have recorded the 18-period SMA price level that occurred on an identical 6/18-period SMA crossover that occurred prior to the current one.
The two 18-period SMA price levels would then be compared to see which is lesser/greater to check for possible momentum.

Would that price level be considered a variable?
Is this possible?
I'm definitely not a programmer, so I ask that the response be in layman's terms.

Thanks in advance for any help provided.

April 23rd, 2013, 02:31 PM

Maybe try something like,

int crossup = SMA(6)[0] > SMA(18)[0] && SMA(6)[1] < SMA(18)[1] ? 1 : 0;
int crossdown = SMA(6)[0] < SMA(18)[0] && SMA(6)[1] > SMA(18)[1] ? 1 : 0;

Cross1[0] = crossup ==1 || crossdown ==1 ? SMA(18)[0] : Cross1[1];
Cross2[0] = crossup ==1 || crossdown ==1 ? Cross1[1] : Cross2[1];
etc.

Will need to define Cross1 and Cross2 as dataseries.

April 23rd, 2013, 06:28 PM

Thanks for your response vegasfoster.

"Maybe try something like,

int crossup = SMA(6)[0] > SMA(18)[0] && SMA(6)[1] < SMA(18)[1] ? 1 : 0;
int crossdown = SMA(6)[0] < SMA(18)[0] && SMA(6)[1] > SMA(18)[1] ? 1 : 0;

Cross1[0] = crossup ==1 || crossdown ==1 ? SMA(18)[0] : Cross1[1];
Cross2[0] = crossup ==1 || crossdown ==1 ? Cross1[1] : Cross2[1];
etc.

Will need to define Cross1 and Cross2 as dataseries."

I'm new to Ninjascript programming. I'm not familiar with the "? 1 : 0;" part of the statement. It seems it's referencing a previous and current SMA crossover occurrence. Please correct me if I'm wrong.
The "? SMA(18)[0] : Cross1[1];" and "? Cross1[1] : Cross2[1];" part of the statements I'm not familiar with. Could you give me a brief walk through of the logic?

April 23rd, 2013, 09:33 PM

vegasfoster,

I think I may understand the logic. I figure the best way to understand this is to do as much on my own as possible, so I did some brainstorming. Please, at your convenience, let me know if my understanding of the logic is correct.

int crossup = SMA(6)[0] > SMA(18)[0] && SMA(6)[1] < SMA(18)[1] ? 1 : 0;
int crossdown = SMA(6)[0] < SMA(18)[0] && SMA(6)[1] > SMA(18)[1] ? 1 : 0;
Logic: If statement is true value = "1", otherwise it's "0"

Cross1[0] = crossup ==1 || crossdown ==1 ? SMA(18)[0] : Cross1[1];
Logic: whether there's an SMA(18) crossover up or down, value will = SMA(18)[0] price level
which is stored as the 2nd and current SMA crossover price level (Cross1[0])...
... otherwise if the crossover SMA(18) value is not current (1 bar or more ago), it
will be stored as "Cross1[1]", the most recent and last SMA(18) crossover price level.

Cross2[0] = crossup ==1 || crossdown ==1 ? Cross1[1] : Cross2[1];
Logic: whether there's an SMA XO up or down, if a fresh current SMA(18) crossover took place
"Cross1[1]" then becomes the prior SMA(18) crossover price level and
"Cross1[0]" then becomes the current SMA(18) crossover price level
... otherwise when SMA(18) crossover is 1 bar old or more,
"Cross2[1]" becomes the stored prior SMA(18) crossover price level and
"Cross1[1]" becomes the most recent and last SMA(18) crossover price level.

Can Prior SMA Crossover Price Levels be Stored?

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Can Prior SMA Crossover Price Levels be Stored?