analisis pengaruh rasio keuangan (CR, ROA, DER, dan TATO) terhadap trend harga saham: studi pada perusahaan industri energi di Bursa Efek Indonesia periode 2012-2016 = The analysis of financial ratio (CR, ROA, DER, dan TATO) against stock price trend in energy companies listed in Indonesia stock exchange period 2012-2016