Help w/rounding Bid/Ask on e-russell

[angatgg]

Hi all,
Can anyone help with the following???

Enclosed is a script I use for a "trading Button" to retrieve MostRecent Bid/Ask pricing and trade when there is only a .10 spread between Bid/Ask on the e-russell. However; some the Ask/Bid prices retreved by getMostRecentAsk()/ Bid() function have extended decimals.(Bad esignal Data????).
So I used a rounding logic to truncate to 2 dec. places.

Simple enough... however when there is only a .10 spread after rounding values, my logic on line 170( ie: if(Ask - Bid == .10 ), is ignored and therefore lines 171 and 172 are ignored.

I have enclosed my script and debug Output file to show the results of Both getMostRecentAsk/Bids and rounded values.


This one has me stumped.

Angelo

[eSignal_JasonK]

Hello Angelo,

Your EFS was not attached to your post. Please try again.

[angatgg]

Hi Jason,

Sorry, will try to post again.

[angatgg]

Hi Jason,

Here is another version, using Stevehare's "round " routine version. Notice the long decimal on the getMostRecentBid().
Also, why is the rounding difference after rounding both Ask & Bid coming up with the difference of a decimal???

I see now why the logic of (Ask - Bid) is not true, since the difference is over .10. But why does (734.9 - 734.8) produce a difference of .10000000000002274 ?????

Thanks for your help!!

Angelo

[ACM]

Angelo

But why does (734.9 - 734.8) produce a difference of .10000000000002274 ?????

That is due to how JavaScript (as well as some other languages) represents certain numbers (see this article in the EFS KnowledgeBase). The solution is to use the .toFixed() method as shown in the enclosed image
Alex

[angatgg]

Hi Alex,

Thanks for the solution to using the Fixed method to truncating decimal places.
I see there is no need to apply rounding in this case. I also see the need to use this Fixed method in the logic as well.

I was under the impression once a number was rounded it would retain its properties of fixed decimal places.

As always, thanking you and the other moderators for your/their immersurable help in these threads!.

Angelo

[ACM]

Angelo
As always you are most welcome
Alex