past_time = 15;
current_time = 5;
total_time = 20;
long_time = 120;
std_mult = 0.25;

is_lower_than_mean = ts_mean(close, current_time) < ts_mean(close, long_time);
is_higher_than_mean = ts_mean(close, current_time) > ts_mean(close, long_time);

people_shorting_mean = (ts_sum(news_short_interest, total_time)-ts_sum(news_short_interest, current_time))/past_time;
…
short_stock = is_higher_than_mean + shorting_more_than_mean == 2 ? 1 : 0;
long_stock = is_lower_than_mean  + shorting_less_than_mean == 2 ? 1 : 0;

trade_when(short_stock, group_rank(sales/assets, subindustry), long_stock);
trade_when(long_stock, group_rank(sales/assets, subindustry), short_stock)