Indicates the constant of the 30-minute K-line period with a value of 1800.
number
{@fun/Market/exchange.GetRecords exchange.GetRecords}, {@var/PERIOD/PERIOD_M1 PERIOD_M1}, {@var/PERIOD/PERIOD_M3 PERIOD_M3}, {@var/PERIOD/PERIOD_M5 PERIOD_M5}, {@var/PERIOD/PERIOD_M15 PERIOD_M15}, {@var/PERIOD/PERIOD_H1 PERIOD_H1}, {@var/PERIOD/PERIOD_H2 PERIOD_H2}, {@var/PERIOD/PERIOD_H4 PERIOD_H4}, {@var/PERIOD/PERIOD_H6 PERIOD_H6}, {@var/PERIOD/PERIOD_H12 PERIOD_H12}, {@var/PERIOD/PERIOD_D1 PERIOD_D1}, {@var/PERIOD/PERIOD_D3 PERIOD_D3}, {@var/PERIOD/PERIOD_W1 PERIOD_W1}
PERIOD_M15 PERIOD_H1