Strategy to buy open of first trading day of the week

Thinkorswim includes some very helpful data/time functions to accomplish this. The one I use most frequently for projects is the GetDay() function. However they also have functions for GetWeek(), GetMonth() and GetYear(). Here is a link to the GetWeek() function I use for this solution:

https://toslc.thinkorswim.com/center/reference/thinkScript/Functions/Date---Time/GetWeek

This function allows us to always pick the first trading day of the week even if Monday is a Holiday.

Here is the code that buys at the open of the first day of the week and takes profit at user adjustable percent above the entry price:

input profitPercent = 4.0;
input tradeSize = 100;
def newWeek = GetWeek() <> GetWeek()[1];
def firstDayOfWeek = newWeek and !newWeek[1];
AddOrder(OrderType.BUY_TO_OPEN, firstDayOfWeek[-1], open[-1], tradeSize, Color.GREEN, Color.GREEN, "First Day Of Week");
AddOrder(OrderType.SELL_TO_CLOSE, high > EntryPrice() * (1 + profitPercent * 0.01), close[-1], tradeSize, Color.RED, Color.RED, "Profit Exit");

Screenshot below show how this chart strategy behaves on the 30 min intraday chart (left) as well as the daily chart (right).