Usage difference between MarketInfo() & SymbolInfoDouble() - page 2
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What do you mean ?
Maybe I didn't explain myself clear enough.. My understanding is Ticksize & Tickvalue obtained from MarketInfo() isn't a constant, it may fluctuate depending on the market condition. However I have not verified it myself, I simply read it from some old post: https://www.mql5.com/en/forum/109552/page3#185757.
Btw, may I ask if this:
EntryPrice = MathFloor( EntryPrice / PriceStep) * PriceStep;is more accurate & correct than this?
They looked similar to me other than the rounding off part.
Thanks.
Yeap, I saw that post before, thanks for the tips. However when you mention ticksize is a constant, do you mean this..
... is always going to be return constant? I've just replied angevoyageur showing him what I meant actually, maybe I explained wrongly in my previous post.
Maybe I didn't explain myself clear enough.. My understanding is Ticksize & Tickvalue obtained from MarketInfo() isn't a constant, it may fluctuate depending on the market condition. However I have not verified it myself, I simply read it from some old post: https://www.mql5.com/en/forum/109552/page3#185757.
Btw, may I ask if this:
is more accurate & correct than this?
They looked similar to me other than the rounding off part.
Thanks.
Ok I see. There are people who report once that ticksize may not be constant. But in my opinion, it was a bug or a broker's error. I never experimented that personally, and I don't want my code to take into account all past bugs and errors. But it's up to each one to decide.
About both code, I didn't check. The code I posted is working, possibly the variant with NormalizeDouble is also ok.
Maybe I didn't explain myself clear enough.. My understanding is Ticksize & Tickvalue obtained from MarketInfo() isn't a constant, it may fluctuate depending on the market condition. However I have not verified it myself, I simply read it from some old post: https://www.mql5.com/en/forum/109552/page3#185757.
Btw, may I ask if this:
EntryPrice = MathFloor( EntryPrice / PriceStep) * PriceStep;is more accurate & correct than this?
They looked similar to me other than the rounding off part.
Thanks.
angevoyageur:
About both code, I didn't check. The code I posted is working, possibly the variant with NormalizeDouble is also ok.
In the above instance, the usage of NormalizeDouble() and MathFloor() don't always give equivalent results. For example:
The above shows that, based on the same price, the two can at times give different results: NormalizeDouble() rounds up (1.40001) while MathFloor() rounds down (1.40000).
@BigFisherman: Just remember...the rounding can be important, depending on the situation. The question is: where to use which and when? That is up to each individual coder. :)
Ok I see. There are people who report once that ticksize may not be constant. But in my opinion, it was a bug or a broker's error. I never experimented that personally, and I don't want my code to take into account all past bugs and errors. But it's up to each one to decide.
About both code, I didn't check. The code I posted is working, possibly the variant with NormalizeDouble is also ok.
You may be right about it being a bug or broker's error. I just did a short test logging 3 instruments' ticks info (Ticksize & Tickvalue of HKDJPY, CFD on Gold futures & CFD on Natural Gas) for the last 4 hrs. The results were consistent thus far. This may not be a thorough test but I supposed it's fairly safe to treat it as a constant. Even if it did fluctuate for a ticksize or 2, the calculated "PriceStep" inaccuracies should be rather insignificant.
In the above instance, the usage of NormalizeDouble() and MathFloor() don't always give equivalent results. For example:
The above shows that, based on the same price, the two can at times give different results: NormalizeDouble() rounds up (1.40001) while MathFloor() rounds down (1.40000).
@BigFisherman: Just remember...the rounding can be important, depending on the situation. The question is: where to use which and when? That is up to each individual coder. :)
Yeah, that's also what I meant about the rounding off difference. Thanks for the heads-up.
Cheers!