Plot 52 week high and low with chart labels

Sorry but this cannot be achieved. You must have data in order to compute a value. On Thinkorswim, if you do not have at least 52 weeks (1 year) of data viewable on the chart you cannot plot a 52 week high. The lowest time frame in which you can include 1 year of data on the chart is the 1 hour time frame. To be clear, that means you would set the chart to 1 hour time frame. Then adjust the "Time Interval" to 360 days. The "Time Interval" setting is found when you access the custom time frame settings on the chart. There are no ways to work around these limitations through any custom code on Thinkorswim.

I found that this thread ( https://www.hahn-tech.com/ans/lowest-low-and-highest-high-between-2-dates/ ) combined with your answer above came close to what I'm looking for. I got what I want using the ToS's "Daily_High_Low", then setting it to Daily aggregation and a length of 253 (number of trading days in a year). I seem to have gotten a study I'm quite pleased with (code below). Interestingly enough, this actually does work on any time frame less than 1 year, the lines and labels stop showing up on any time frames greater than 1 year. That being said, I have a couple things that would make it better:

1. Can you help me combine my four labels into two labels? I couldn't figure out how to make one label say "52wk High: [value of DailyHigh]", and then the same for 52wk Low.
2. I tried to apply the same logic to get lines and label for an all-time high/low, but I couldn't get it to work. Either it wouldn't go back far enough or it would have to go back too far, and so any chart with a smaller timeframe the study won't show (in plain speak, if I pull 10 years of data, any charts with less than 10 years of data won't show). If you have any suggestions I'm all ears.

Anyway, here's my code:

input aggregationPeriod = AggregationPeriod.DAY;
input length = 1;
input displace = -1;
input showOnlyLastPeriod = no;

plot DailyHigh;
plot DailyLow;
if showOnlyLastPeriod and !IsNaN(close(period = aggregationPeriod)[-1]) {
DailyHigh = Double.NaN;
DailyLow = Double.NaN;
} else {
DailyHigh = Highest(high(period = aggregationPeriod)[-displace], length);
DailyLow = Lowest(low(period = aggregationPeriod)[-displace], length);
}

DailyHigh.SetDefaultColor(GetColor(4));
DailyHigh.SetPaintingStrategy(PaintingStrategy.HORIZONTAL);
DailyLow.SetDefaultColor(GetColor(4));
DailyLow.SetPaintingStrategy(PaintingStrategy.HORIZONTAL);

AddLabel(yes, "52wk High:", color.CYAN);
AddLabel(yes,DailyHigh , color.CYAN);
AddLabel(yes, "52wk Low:", color.MAGENTA);
AddLabel(yes,DailyLow , color.MAGENTA);