Examples of isolating/showing time?

[melfice_187]

I'm new to thinkscript. I have experience mostly in C# and a tiny bit in javascript.

The hard parts of thinkscript have been some of the parts of javascript that plagued me, isolating time. Are there a few examples or links to other posts with good examples of say isloating a specific 30 minutes of premarket or intraday and converting it to proper time with labels? I hope my question makes sense. Thanks all so much for the awesome work, I immediately upgraded my account as soon as I found this place. Love the community here!

 

[melfice_187]

Here is a more specific use case example:
Using the example from the documentation, I can plot volume just in the premarket or I can tweak it to start plotting volume in the premarket and cut off before after market hours. But what if I want to just show intraday? Cut off premarket and aftermarket on the plot.

def isRollover = GetYYYYMMDD() != GetYYYYMMDD()[1];

def beforeStart = GetTime() < RegularTradingEnd(GetYYYYMMDD());

def vol = if isRollover and beforeStart then volume else if beforeStart then vol[1] + volume else Double.NaN;

plot PreMarketVolume = vol;

 

[rad14733]

@magus Without testing I'm pretty sure you could control the visibility through conditional look and feel formatting for the plot itself... For example, conditional PreMarketVolume.SetDefaultColor( . . . . ) based on your time criteria... Or plotting based on that same criteria... Maybe something like plot PreMarketVolume = if isRollover and beforeStart then vol else Double.NaN;...

 

[melfice_187]

Thanks for the answer! I have a few other use cases for this which is why I’m trying to learn some time patterns.
I would like to see the cumulative volume intraday without having to turn off extended hours in the chart.

 

[rad14733]

@magus I wish I could say I'm proficient with time based calculations but I don't feel that I am... I consider @XeoNoX , @SleepyZ, and @mashume, to be better versed at time and counter related code...

I hope my suggestions above can be adapted to suit your needs...

 

[melfice_187]

Yeah, I'm trying to play with everything I can right now. Thank you also for responding and sending me over a few names. I can at least browse through all your collective posts since searching for specific things can be a challenge in the forum.

 

[mashume]

If I understand you, @magus, you're looking to plot just the cumulative regular-trading-hours volume?

def rth = if secondsFromTime(0930) >= 0 and secondsTillTime(1600) >= 0 then 1 else 0;
def cumulative_rth_volume = if rth then cumulative_rth_volume[1] + VOLUME else 0;
plot cum_rth_vol = cumulative_rth_volume;

You can adjust times as you want, 24hour format, east coast time. If I missed the mark on what you're trying to do, just let me know.

-mashume

P.S. This may or may not be quite right... I'm just typing in the text editor, not ToS.

 

[melfice_187]

@mashume Thanks a bunch for this pattern. This is good for me to understand, I had achieved a similar result checking GetTime() against RegularTradingStart/RegularTradingEnd but I thought there might have been an error because the plot line would go straight down to zero instead of masking. Now I know why, because your "0" and my double.nan both equal zero.

The other thing that was giving me an issue is that when I applied this to making a label with volume I would get "0". I now know this is because it's checking live data and in order for me to look at a historical stock, I need to use another time frame function like "AggregrationPeriod" or set demand to the last bar before market close with the example you gave above.

Manipulating time for data is so confusing with thinkscript. I wish I could just loop through days and find exactly what I'm looking for. Thanks again, sorry for the rant, this how I learn

 

[mashume]

@mashume Thanks a bunch for this pattern. This is good for me to understand, I had achieved a similar result checking GetTime() against RegularTradingStart/RegularTradingEnd but I thought there might have been an error because the plot line would go straight down to zero instead of masking. Now I know why, because your "0" and my double.nan both equal zero.

The other thing that was giving me an issue is that when I applied this to making a label with volume I would get "0". I now know this is because it's checking live data and in order for me to look at a historical stock, I need to use another time frame function like "AggregrationPeriod" or set demand to the last bar before market close with the example you gave above.

Manipulating time for data is so confusing with thinkscript. I wish I could just loop through days and find exactly what I'm looking for. Thanks again, sorry for the rant, this how I learn

Cool. Glad to be able to help. Part of the fun of thinkscript is that, while the language loops over the chart, it is largely a functional programming paradigm. Once you start thinking about it in those terms, it all makes a whole lot more sense.

-mashume

 

[ezrollin]

how would I scan for
close is greater than LegacyEMA("length" = 8);
only within the first 1 minute of every day? thanks

 

[mashume]

how would I scan for
close is greater than LegacyEMA("length" = 8);
only within the first 1 minute of every day? thanks

You can't mix aggregation periods in a scanner. So. If you want to see what's above the 8 day ema, you could use something like OPEN > LegacyEMA("length" = 8). If you really want the first minute, you'll need to figure out your ema on a minute basis to match.

-mashume

 

[rad14733]

@mashume This isn't an aggregation issue, it's just watching the time and seeing whether the price, which would be high, closes, goes above the average... So it's a matter of time, not aggregation...