A senior independent director at Synectics bought some shares in the strategic surveillance technology group.Peter Rae spent £18,620, purchasing 14,000 shares for 133p each, increasing his stake to a total of 232,302 shares.The company secured a contract with Jakarta International Airport last week, where it will supply an integrated airport security and safety management solution for Terminal 3 Ultimate at the airport.Last month, Synectics reported a 21.6% decline in revenue to £64.6m, while its profit of £7.1m in 2013 turned into a £2.4m loss in 2014. The group said it was hurt by the slump in the global oil and gas market.Top Director BuysChime Communications (CHW) Director name: Lord Mervyn Davies Amount purchased: 17,936 @ 278.76p Value: £49,998Blue Planet Investment Trust (BLP) Director name: Mr Kenneth MurrayAmount purchased: 100,000 @ 40.00p Value: £40,000Edge Performance VCT 'H' Shares (EDGH) Director name: Mr David S GlickAmount purchased: 30,059 @ 85.87p Value: £25,812EPE Special Opportunities (ESO) Director name: Mr Geoffrey O VeroAmount purchased: 18,182 @ 110.00p Value: £20,000Synectics (SNX) Director name: Mr Peter RaeAmount purchased: 14,000 @ 133.00p Value: £18,620Bacit Limited (BACT) Director name: Mr Martin ThomasAmount purchased: 12,268 @ 122.15p Value: £14,985Bunzl (BNZL) Director name: Mr Patrick LarmonAmount purchased: 619 @ 1,563.69p Value: £9,679Alliance Trust (ATST) Director name: Mr Katherine Garrett-CoxAmount purchased: 2,255 @ 515.00p Value: £11,613Top Director SellsStandard Chartered (STAN) Director name: Mr John PeaceAmount sold: 58,115 @ 1,079.00p Value: £627,061Standard Chartered (STAN) Director name: Mr Peter A SandsAmount sold: 45,000 @ 1,076.00p Value: £484,200Dairy Farm International Holdings Ltd. (Singapore) (DFI) Director name: Mr Michael KokAmount sold: 29,100 @ $9.41 Value: $273,921Dairy Farm International Holdings Ltd. (Singapore) (DFI) Director name: Mr Michael KokAmount sold: 1,500 @ $9.38 Value: $14,075